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Modifying combustion chambers- DONE SOME (PICS)

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Old 15-10-2007, 09:15 AM
  #41  
JonnyBravo
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Stav- It was a joke but I can certainly think of a few times you have changed your mind on things half way through a project.

This is by far the best move though, VERY little cash involved, and obviously much more fun as your doing it yourself

Budget builds are always the best ones well so far anyway
Old 15-10-2007, 09:19 AM
  #42  
Fudgey
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get the angle grinder out stav
Old 15-10-2007, 09:40 AM
  #43  
Stavros
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Ian-
Cheers mate your right of course, at least it doesnt lose too much power as it gets hot like some things, and ill have to soldier on with the tools i got, im skint at mo

Idve loved to do a before and after test, but because i had no idea on the engines condition i had to take it to bits anyhow. Tons of people in the states just run the engine bog stock with the turbos on running 10-12psi (and running 10.5quarters like that ), so might be able to get some slight comparison.
All im expecting is hopefully to be able to safely run more boost on pump fuel, as its revs that kills em. They seem to be able to take decent boost, 20psi+, on stock internals if you can keep the revs down and stop the det (ie by running race fuel if stock compression).

Dan-
Were gonna do that to one of Gregs Subaru heads as he has fucked one of em when taking it apart, so gonna chop it up to have a good look at it
Old 15-10-2007, 09:51 AM
  #44  
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Originally Posted by foreigneRS
Originally Posted by Stavros
Lloyd- Copying what? I dont even know what a crossflow (if you mean old ford one) head looks like.
a crossflow head just means that the inlet charge comes in one side of the head, and exhausts out of the other, rather than having both sets of ports on one side of the head
err wrong actually mate crossflow just means as you look at head from one end to other the ports cross ie exh,inl,inl,exh,exh,inl

thats why they were termed crossflow i seem to recall
most heads have intake one side and outlet the other as its more efficient as hot exh manifold isnt heating the inlet manifold killing performance ....
although there are some exceptions to this like r5 gt turbo ,mini
Old 15-10-2007, 09:55 AM
  #45  
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We're doing a stock 302 twin turbo at the mo steve, we just fitted it in an E21 beema I wouldn't worry to much on getting the compression down, especially if you dont intend to rev it hard
Old 15-10-2007, 10:03 AM
  #46  
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Originally Posted by Danny B
We're doing a stock 302 twin turbo at the mo steve, we just fitted it in an E21 beema I wouldn't worry to much on getting the compression down, especially if you dont intend to rev it hard
Wicked Let me know how it goes I dont even know what car im gonna put this in! One step at a time eh

Not gonna rev it hard, 5k tops if i can, but its not revs where comp matters really, its at peak torque, and as they dont like revs i plan to make up for that with as much boost as i can get away with!
2bar all the way till the block cracks 2secs later

Im massivley tempted with an autobox too, but do NOT understand how they work (ie what one to get and when they choose to change up or down a gear, or whatnot), so i think ill be needing your help
Old 15-10-2007, 10:12 AM
  #47  
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C4 box which manual valve body, gives you 3 gears manual shifter without lifting of clutching, run a high stall convertor so its into boost when it locks and your away.
Send me a link to who you got the turbo kit from, I know what make it is so wont mention before it gets commented on I need another kit.
Old 15-10-2007, 10:17 AM
  #48  
RichardPON
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Originally Posted by Stavros
Im massivley tempted with an autobox too, but do NOT understand how they work (ie what one to get and when they choose to change up or down a gear, or whatnot), so i think ill be needing your help
I'd love to know the answer to that too actually.

Was watching overhaulin or some other programme the other night, and they put this "convertor" inside the bellhousing of the box on the mainshaft - how does that work?
Old 15-10-2007, 10:22 AM
  #49  
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Rich,
The tourque convertor is a fluid filed clutch basically. The housing of the torque converter is bolted to the flywheel of the engine, so it turns at whatever speed the engine is running at. The fins that make up the pump of the torque converter are attached to the housing, so they also turn at the same speed as the engine. The pump inside a torque converter is a type of centrifugal pump. As it spins, fluid is flung to the outside, much as the spin cycle of a washing machine flings water and clothes to the outside of the wash tub. As fluid is flung to the outside, a vacuum is created that draws more fluid in at the center. The fluid then enters the blades of the turbine, which is connected to the transmission. The turbine causes the transmission to spin, which basically moves your car.
Old 15-10-2007, 10:24 AM
  #50  
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wow - had no idea it worked like that!

Cheers
Old 15-10-2007, 10:25 AM
  #51  
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I totally didnt think of a manual valve body, perfect!

You have PM regarding turbo kit and more autobox questions, ill DEFFO will run one now
Old 15-10-2007, 10:27 AM
  #52  
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busses use fluid flywheel clutchs too, another good thing about them is they offer smooth takeup, so even if you let the wife, she wont kangaroo the fucker down the road
Old 15-10-2007, 11:54 AM
  #53  
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How easy to find / cheap are the 302's and 351 engines?
Old 15-10-2007, 12:11 PM
  #54  
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Gonna be interesting. Looking forward to seeing the results.
Old 15-10-2007, 12:30 PM
  #55  
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Originally Posted by SapphyMike
How easy to find / cheap are the 302's and 351 engines?
Easy for me to find, i look in by back garden and find one of each

IIRC we left an old 351C at the old house when we moved out

Paid 300odd (350maybe?) for the 302W and 50, yes 50 quid for the 351W And that came with 8 brand new forged pistons in a box, and a full gasket set

What you got in mind?
Old 15-10-2007, 12:33 PM
  #56  
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bit like yourself Steve, bit of learning etc.
Old 15-10-2007, 12:33 PM
  #57  
Fudgey
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just had a thought, and thats for the home diy'er head porting peeps.

all ford stuff uses alloy heads, so a dremmel wont be much use as the stone will clog very quickly
Old 15-10-2007, 12:34 PM
  #58  
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Mike- There a lot of easier and cheaper to get engines than one of them for a bit of learning mate!

Dan- Kent/Crossflow, Pinto, Essex, Windsor, Cleavland, etc etc etc, all Iron heads
Old 15-10-2007, 12:42 PM
  #59  
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yeah, but i was born in 1981 and since then, they all been alloy

i think
Old 15-10-2007, 12:42 PM
  #60  
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such as what would you recommend Steve?

bearing in mind I want to be able to put it in a car and test afterwards..
Old 15-10-2007, 12:46 PM
  #61  
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fudge- every single one of those engines were still in production in 1981

Originally Posted by SapphyMike
such as what would you recommend Steve?

bearing in mind I want to be able to put it in a car and test afterwards..
well that makes a 302 or 351 a pain as they wont fit in anything easy, etc etc.

surely anything common and cheap, depends what you planning on experermenting with, wether you want n/a or turbo, or what.

2.8 cologne would be kinda interesting as they have piss poor exhaust ports (4 for 6 cyls!) and bet with some surgery they can be improved a good bit.

i dont know n/a tuning that brilliantly so all stuff i wanted to expererment with is related to turbos.

i refuse to show my carbs and inlet manifold set up as they way we had people reckoning what im doing now is a bad idea (even though they had no idea what they on about) theyd REALLY not like my inlet/carbs setup, even im not sure its a good idea
Old 15-10-2007, 01:02 PM
  #62  
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Originally Posted by Stavros
fudge- every single one of those engines were still in production in 1981

Originally Posted by SapphyMike
such as what would you recommend Steve?

bearing in mind I want to be able to put it in a car and test afterwards..
well that makes a 302 or 351 a pain as they wont fit in anything easy, etc etc.

surely anything common and cheap, depends what you planning on experermenting with, wether you want n/a or turbo, or what.

2.8 cologne would be kinda interesting as they have piss poor exhaust ports (4 for 6 cyls!) and bet with some surgery they can be improved a good bit.

i dont know n/a tuning that brilliantly so all stuff i wanted to expererment with is related to turbos.

i refuse to show my carbs and inlet manifold set up as they way we had people reckoning what im doing now is a bad idea (even though they had no idea what they on about) theyd REALLY not like my inlet/carbs setup, even im not sure its a good idea
LOL.

i like the idea of a tt 351 in a mk2 granada..

the 2.8 Cologne has Siamese ports hence why they're so shit lol
Old 15-10-2007, 01:08 PM
  #63  
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what sort of power/performance you after?
Old 15-10-2007, 01:13 PM
  #64  
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Originally Posted by Stavros
what sort of power/performance you after?
enough to upset people
Old 15-10-2007, 02:09 PM
  #65  
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Originally Posted by Dan@FastFord
just had a thought, and thats for the home diy'er head porting peeps.

all ford stuff uses alloy heads, so a dremmel wont be much use as the stone will clog very quickly
I found that using WD40 as a 'cutting lube' stopped ally sticking to tooling
Old 15-10-2007, 02:12 PM
  #66  
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Originally Posted by Big Will 85
Originally Posted by Dan@FastFord
just had a thought, and thats for the home diy'er head porting peeps.

all ford stuff uses alloy heads, so a dremmel wont be much use as the stone will clog very quickly
I found that using WD40 as a 'cutting lube' stopped ally sticking to tooling
cool, ill bear that in mind when i have to port match the inlet manifold to head flange lol

that will be done with a dremmel too lol
Old 15-10-2007, 02:15 PM
  #67  
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Originally Posted by stage 3 muppet
Originally Posted by foreigneRS
Originally Posted by Stavros
Lloyd- Copying what? I dont even know what a crossflow (if you mean old ford one) head looks like.
a crossflow head just means that the inlet charge comes in one side of the head, and exhausts out of the other, rather than having both sets of ports on one side of the head
err wrong actually mate crossflow just means as you look at head from one end to other the ports cross ie exh,inl,inl,exh,exh,inl

thats why they were termed crossflow i seem to recall
most heads have intake one side and outlet the other as its more efficient as hot exh manifold isnt heating the inlet manifold killing performance ....
although there are some exceptions to this like r5 gt turbo ,mini
muppet by name, muppet by nature

less of the please mate

i was right in the first place i think you'll find. the predecessor to the ford kent engine (commonly called the crossflow as it was the first of the mainstream fords to use a crossflow cylinder head design where the air flows in one side and out of the other) had a non-crossflow cylinder head as was common before the late 60's with both inlet and exhaust on one side.

since then, partly as you say due to not wanting to heat the inlet too much with the exhaust gasses, but also due to improved port routing creating better scavenging, most cylinder heads have been of the 'crossflow' design

see wikipedia mate. i know it's not definitive, but in this case, like me, it's correct

http://en.wikipedia.org/wiki/Crossflow_cylinder_head
Old 15-10-2007, 02:19 PM
  #68  
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Originally Posted by Stavros
i refuse to show my carbs and inlet manifold set up as they way we had people reckoning what im doing now is a bad idea (even though they had no idea what they on about) theyd REALLY not like my inlet/carbs setup, even im not sure its a good idea
Like this:

Old 15-10-2007, 02:25 PM
  #69  
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No mate, I WISH I had the spare cash to buy a 4barrel converted to blow thru and a 4barrel manifold, and they fine anyhow, turbo cars have been proven to do well over 1500bhp@wheels on a single 4barrel blow thru with no nitrous

Thatd not be expensive, but still about 500quid for the carb (delivered), 150odd for the manifold, and 150odd for the carb hat.

Mines "different" TBH it might work just as well, it might not, ill do some more sums If it does its a winner, cost me 100quid!
Old 15-10-2007, 02:27 PM
  #70  
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Stavros

I've got a hole-saw set you can borrow for when you tweak your carb?
Old 15-10-2007, 03:09 PM
  #71  
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Only one of them?

Its the right time of year, ill use some fireworks to tweak the other
Old 15-10-2007, 03:09 PM
  #72  
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Originally Posted by Stavros
No mate, I WISH I had the spare cash to buy a 4barrel converted to blow thru and a 4barrel manifold, and they fine anyhow, turbo cars have been proven to do well over 1500bhp@wheels on a single 4barrel blow thru with no nitrous

Thatd not be expensive, but still about 500quid for the carb (delivered), 150odd for the manifold, and 150odd for the carb hat.

Mines "different" TBH it might work just as well, it might not, ill do some more sums If it does its a winner, cost me 100quid!
what you planing on sticking it in, if ever?
Old 15-10-2007, 03:11 PM
  #73  
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dont care what it goes in, prob end up in a sierra as itd be about the cheapest suitable vehicle, but anything with an enginebay it fits in.
Old 15-10-2007, 03:22 PM
  #74  
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nice

Have you seen the V8 TT 1005bhp Omega?
Old 15-10-2007, 03:26 PM
  #75  
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Ive seen this supercharged Lexus V8 one if thats what you mean?
www.rats.no/omega_tg.html

Its cool, not exactly VFM tho.
Old 15-10-2007, 03:28 PM
  #76  
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i meant supercharged.

brain fade LOL

i know, a TT 351 would seem more VFM tbh.
Old 15-10-2007, 03:34 PM
  #77  
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That engine alone would cost what, 20k+ to build? 30k+ maybe?

Could buy a n/a big block crate engine dyno'd at 950bhp for 10k.

Could build a 1500bhp+ turbo 302 or 351 for under 10k i reckon, and itd barely be trying either.
Not stock block tho, standard windsor blocks shit themselves and split in two at less than half that power.
Old 15-10-2007, 03:35 PM
  #78  
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exactly - he could've put an RB30 or something in for less as well, and i'm sure it would've fitted.
Old 15-10-2007, 03:40 PM
  #79  
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Id not wanna go RB30 at 1000bhp+ if i had a choice of other engines, even a 2JZ is better, never mind just using bigger engines.

Were going more than slightly off topic now anyhow.
Old 15-10-2007, 03:44 PM
  #80  
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indeed we are, but then this is pf, when does anything stay on topic, unless someone is bitching about someone else lol.

so, to keep on but off topic slightly, what engine would you suggest I start to take apart? lol


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