chriswoodleyrst

And will a t38 be up to the job

JK99

If it were me, I'd over-spec much of the job (pistons, rods, bearings, bolts etc) as you never know if the bug will get you and you'll want more. If it doesn't, you're left with a reliable motor.

T38 should be up to the job - there's a clown on here who says his is pushing 550! ha ha ha!

400 should be fine.

JK

AndyG31

Ever checked out Craig Rainers MkII Escy racer with a yb turbo in? 420Bhp, 400 ft/lbs torque from 2500rpm to 7k and its ALL STANDARD internally!!! Its got a hybrid turbo and a Motec ecu. It was built by Jon Edwards at JEMS. Check out www.jemsracing.co.uk

J1mbo

iTrader: (1)

all standard internals are fine and dependant on whos chip your wanting to use you may have to change compression ratio
the head will flow 400 but a light port or polish would be nice !
change the cam and a t34 will just bout get you 400bhp
a t38 is abit overkill imo

chriswoodleyrst

Have got a t34 with 360 bearing allready on car but i thought they run on;y up to bout 360 bhp, Was thinking of going for standard rods, b 12 inlet, standard exhaust cam , siemens 63lb injectors , mahle low comp pistons, and have the thing lightened and balanced and with the t38 turbo, What sort of power would u expect from that speck

costina

iTrader: (1)

One of MAD cars has made over 440 bhp on a std head
T34/63 (depending on spec can see around 420 max)

All depends what u really want ie 400 now 500 later??
My advice is spec for 500 (bottom end) and aleast it won't cost u another set of piston etc cheaper to that way imo

Paul

J1mbo

iTrader: (1)

well not sure on siemens injectors as i dont have any knowledge on them but dependand on what spec t38 you could see up to 440+ bhp but you would need some work on your head
also youd want to use a decent gasket id say a wrc gasket is the best bet

costina

iTrader: (1)

depends what housing is on your T34? 48/55/63 Bd 12 is a waste of time imo if any a 14 inlet

Paul

J1mbo

iTrader: (1)

you can have 500 on a standard bottom end with lower comp pistons as he wants to use anyway

cossiemanden

std engine with 4x4 inlet
t38 or gt3076
bd-12 or 14 inlet cam
Siemens injectors
custom map

Bingo

costina

iTrader: (1)

Job done then

best bet and J1mbo will agree go for a tried and tested spec from a known tuner as they have many different combos that will give different results.
its not just about power a good torqure figure is also the key

Decide on a tuner and take their advice

Paul

J1mbo

iTrader: (1)

thats spot on advce

choose your tuner and build your engine to their spec !
do not then go and take advice of people on here and other tuners !!

good luck with it

costina

iTrader: (1)

Nuff said i think

Paul

Mark Shead

You can have 500hp on stock compression.

Mark

chriswoodleyrst

what best route for low lag , is it to keep standard compression

J1mbo

iTrader: (1)

dependant on whos chip your gonna use or if your having it live mapped

J1mbo

iTrader: (1)

as said depends on if you will have it live mapped of whos chip you will use

Mark Shead

Any high hp needs to be live mapped for safety and power.

Mark

J1mbo

iTrader: (1)

yep but that can depend on the budget people are on
but ofcourse its the right way to do things

chriswoodleyrst

Does the map really make that much difference dsidnt realise u could minamize lag and that sort of stuff, cheers 4 this info guys

Rod-Tarry

Before you start trying to tell Mark how to design a Cosworth engine can I suggest that you go away for about 30 years become twice as good as your old man & then you will be almost at the same level of expertise as Mark on the subject.

J1mbo

iTrader: (1)

right o rod
twice as good as my old man ..... okii doky

and for the record i wernt telling mark how to build engines as he seems capable of that ... i was agreeing with him

J1mbo

iTrader: (1)

didnt think id get a reply .... wernt no need for it really was there ............

costina

iTrader: (1)

oh dear not again

Why can't people get on ??? its only an internet forum to ask questions and express views and opinions

Jim no doubt knows a lot more than most people(lucky for him!!)due to his dad

Rod i would have expected more form you i'm dissapointed

This is not a competition guys

Paul

J1mbo

iTrader: (1)

this is what i was thinking paul
i dont thinki deserved that was abit out of order ! i didnt "tell" mark to do anything ! i was having a discussion about things ! not "teaching him how to design a yb"

and rod why come on and make such a bold statement then not bother to back your comment when i replied ? ? ? ?

and paul i wouldnt say i no more than you ... i still have alot to learn and its good when im corrected !

Chip

iTrader: (3)

Id go for a cossie rich spec motor, bd14 inlet, spaced 4wd plenum, decent map on it and a GT30

bud-weis

Jimbo, your first reply shows you don't know as much as you probably think...and i'm no expert myself!

On the other hand at least you replied lol

No need for Rods below the belt comments either, but we've come to expect that from him as he's like that and loves getting people to bite.....his car bores the fuck out of me now and luckily it's never working long enough for me to be bothered.

My own take on it is that if you want a nice fast reliable road car then get a T34 on a standard engine and head...maybe with a little porting. It won't make 400bhp but it'll still be much nicer to drive than a 420bhp T38 powered car ( although not quite as quick once past 70mph. )

Even better would be a small GT30 as mentioned above!

J1mbo

iTrader: (1)

id say im rather modest in what i know ... i dont like to be the know it all
i would rather read peoples comments and learn from them ...

can i ask why you dissagree with it too

cozzfather

iTrader: (1)

i dunno........? low comp, standard comp, and a proper touring car driver and cosworth specialist told me high comp is the best if you wanted to win at fastest yb, then he told me you find the engine will knock so you use a fuel additive like toluene

Chip

iTrader: (3)

Personally I think Jim gave some pretty good advice in this thread, there is more than 1 way to skin a cat, and while MAD and SCS might have different ways of doing things both of them are perfectly capable of building a good 400bhp or 500bhp engine, there is no right or wrong answer IMHO

Chip

iTrader: (3)

Any chance you could explain to me what is wrong with his post there mate, cause Im damned if I can see a problem with it?

Jay,

iTrader: (4)

but people insist on over spooling a t34 to get 400bhp which fuckin kills me

bud-weis

Fair play for actually wanting to read comments and learn!

there are only a few peoples opinions on here that i personally would trust though, there are LOADS of clever people too, but only a certain few who i'd actually trust to work on my own cars and believe what they tell me as fact...they are;

Karl Norris
Stu
Mark Shead ( as long as his runt is nowhere to be seen )
Tony Turbosystems

As for what i disagree with, the first part about comp ratio...there's really no need to worry about it at those power levels.

Your other comments are kinda right, although it depends what parts are fitted to get a standard head to make 400bhp...i've personally never seen a T34 do it anyway.

Don't take my ramblings as fact though whatever you do!

cozzfather

iTrader: (1)

Toluene can be used as an octane booster in gasoline fuels used in internal combustion engines. Toluene at 86% by volume fueled all the turbo Formula 1 teams in the 1980s, first pioneered by the Honda team. The remaining 14% was a "filler" of n-heptane, to reduce the octane to meet Formula 1 fuel restrictions. Toluene at 100% can be used as a fuel for both two-stroke and four-stroke engines; however, due to the density of the fuel and other factors, the fuel does not vaporize easily unless preheated to 70 degrees celsius (Honda accomplished this in their Formula 1 cars by routing the fuel lines through the muffler system to heat the fuel). Toluene also poses similar problems as alcohol fuels, as it eats through standard rubber fuel lines and has no lubricating properties as standard gasoline does, which can break down fuel pumps and cause upper cylinder bore wear.
Toluene has also been used as a coolant for its good heat transfer capabilities in sodium cold traps used in nuclear reactor system loops.
Toluene has been abused by teenagers in the early to mid 1990's to get high, this was prominent in Dallas, Texas. This was known as "Tolly" in the streets, in which certain brands of octane booster that contained Toluene were used in small rags and "huffed". The effects caused mild to serious hallucinations

Chip

iTrader: (3)

Well those people often disagree on things, so when that happens which one would you agree with?

For example, ask Karl and Mark what compression you should run for 600bhp, and you will get two VERY different answers.

you disagree with his comment that if you use a chip that is designed for low comp you must also use the correct comp to match that?

j1mbo has, as his dad has built that very engine before, especially if talking about a cut back blade t34 (you dont mention if its a standard one or not you refer to and neither does he)

Good advice!

J1mbo

iTrader: (1)

the reason i said about different comp rations is not due to "safety" or stregnth reasons its due to the different chips different tuners use ...

where scs have specific chips for set engine specs if someone wanted to use a scs chip they would build it to that spec !

same as for msd mad reyland ect ect

bud-weis

Chip, you really are a cock sucking fag at times!!

They may disagree on things but i'm pretty sure all can build a 600bhp engine just fine...so it doesn't matter in the slightest who i listen to.

The poster asks for advice on what parts to build a 400bhp engine he'd need, it'd be very poor advice IMO to recommend using a chip/mapper that requires a change in compression ratio at such moderate power levels, no?

His dad may have built lots of T34 engines that make 400bhp...but i'd personally be surprised if any were on standard head/cams. And if they were then i'd suspect turbo's would be very stressed, even ones with cut back turbines!

And please don't pick apart this post and quote each little sentence seperately, as;

1) You bore the fuck out of me.
2) it's not getting the questions answered and is unfair on the guy asking questions!

bud-weis

Surely people build an engine then have it mapped (or chipped lol) to the spec the engine has been built to? Not the other way around?

J1mbo

iTrader: (1)

no as some companys cant map webber ecu's so they have specific chips .. you build the engine to the company your using chip..

if your using a company that will/can live map then build the engine as you like and get it live mapped !

but not everyone wants to use the same company !

Chip

iTrader: (3)

For pointing out you were having a go at someone for no reason, wow, interesting viewpoint.


Well if you believe Karl when he says build it low comp is the BEST way and you believe Mark when he says build it high comp is the BEST way, what decision would you then make on your own engine?


I personally wouldnt specifically change the compression at that power level, but on the other hand if you are rebuilding it anyway (which IS a good idea if you want it to last) then lower Comp is a perfectly acceptable way to go, not the choice I would make myself but still acceptable.


Im sure Mike R or J1mbo can give you some details of that.

Cossie Rich's T34 on a low comp engine did 17000 hard miles before it finally died, at 2.3 bar IIRC

Actually it IS getting the question answered, as its getting across the fact that you are wrong to keep saying things cant be done the way j1mbo is saying, when the fact is they CAN
Ive no interest at all in if I am boring you or not, my interest is just in the poster getting good advice.