James Porter

iTrader: (1)

Now I read so many different builds/for sales etc & so many different spec YB's.

I know everyone will want different types of power but is it as clear cut to say to your tuner that I want X amount of power so what do I need!?

Just seems everyone has a different specs for similar figures!

I have a good rebuilt 200 block with 4x4 head, pocketed Pistons & L8 ecu.

I basically want my power range to be low down (hate lag & live in London) & come in strong. Not really worried about top end just want it short & very sharp.

I will have a high power to rate ratio as the car is stripped out & very light.

Just not sure what way to go with it, would like 400 ft lb torque though

JP

Caddyshack

I would strap on a twin scroll turbo and twin scroll manifold (Borg Warner) and get the engine loom replaced. If the budget allows then go for standalone and if not then a good live map. I went coil on plug. This set up leaves the engine standard and gets rid of lag in a massive way. You would be holding back the engine for 400bhp and 400 lb ft as my standard engine did 469 bhp and 500lbft. The Biggs is that the torque and power are really low down, mine was making more power at 3500 than the t34 did at 7800

Caddyshack

With those Pistons you could get the cam done. If it is long studded you can run the smallest Borg Warner up to around 530bhp flat out...it has to be the best bang for the buck.

The gearbox in std form shits itself over 400lbft if it is low down, if you can replace to a close ratio box then it will keep it in power band. You are welcome to come out in mine near GUILDFORD once the new box goes in.

James Porter

iTrader: (1)

Thanks for the offer mate appreciate that

There's no budget as such but don't really want to keep throwing money at it chasing power

Caddyshack

It's more about drivability than chasing numbers, the modern set up produces more power as a by product, you can always tell the mapper to do a lower boost setup to match what you want, for example I have a 400bhp map at the flick of a switch.

smiley

A confusing subject for sure and costly if you make mistakes like I did at the start after alot of research and discussions with various tuners I found the right one for this type of yb a modern responsive low lag motor I've been getting parts together under his advice and Im looking forward to the day it comes together give mark a call Toby will say the same

Bart

I am using twin scroll 6758 and hope to get full boost before 3000 rpm and around 475bhp. This is on a full build engine though. If i have the time on the dyno will test it against a 7064 on the same engine.

Caddyshack

Yup, speak to Mark Shead without a doubt.

James Porter

iTrader: (1)

What's a good recommended stand alone management ?

Bart

Choose a good mapper and use what he recommends.

James Porter

iTrader: (1)

I'm dangerous though Bart, these smooth talking tuners would get me all excited & I'll end spending thousands

smiley

This will happen anyway it's not cheap

Caddyshack

Mark Shead is local enough to you, he did vipec for me and also did a lot of autronic, he then went on to a lot of emtron and really seems to rate it.

You will spend a few thousand though if you do turbo, manifold, loom and standalone plus mapping and fitting.

Bart

I have a complete autronic sm4 with cdi and loom if youre interested in a standalone ecu. I can give a good price for you

Caddyshack

The autronic is good and lots map them.

James Porter

iTrader: (1)

I'll speak to Mark tomorrow

smiley

Bart what is it you run? Rally cars? I've seen you sell some tasty parts in the past

Jay,

iTrader: (4)

Yep I can say it's very cheap

Bart

They are mostly rallycross parts.
I still have some big valve heads, linered blocks with billet caps, turbo's,...

smiley

Sell us a diff only want one

Jay,

iTrader: (4)

Bollocks I hoard spares lol

Caddyshack

I might need a good 4x4 head

James Porter

iTrader: (1)

It was Bart I bought my engine from !!

lee2cossies

iTrader: (2)

How much you after for the autronic?

Bart

I send you a PM

Bart

Only have a full spec big valve 4x4 head at the moment.
I have a ported 2wd head which is completely rebuild.

Caddyshack

is the big valve 4x4 for sale?

Bart

You have PM

Caddyshack

Thanks, responded.

Rod-Tarry

Have been @ 850bhp since 2008 & will be well over 900bhp on a 9180 so what Power needs bigger valves as mine are standard. Not a Turbo engine for sure bigger valves will destroy everything.

Bart

Then all rallycross engines will be shit lol
You ever tried a big valve head?

Caddyshack

I forgot that you had said this before. I was assuming there would be no harm in going bigger as long as it has been flowed etc.

I know the 6500 heads by smith and jones are bigger but I think that is aimed at N/A making bigger power as they are over 360bhp na.

Jay,

iTrader: (4)

Don't think rod is saying that as a rally x engine a very purpose built thing . Thing is many engine builders that are tuners have there own recipes lol there are a few ways to make a stew

Regards Jay

gcfcos

Well said
That man

smiley

As I said above I made a mistake at the start be careful I thought the same as you the rally x head massive ports solid lifters Isky springs sounded great would've drove like a pig off boost in a road car these rally x cars are on full throttle from go so suits them it's in the garage useless to me

Bart

They dont run massive ports at all. 26,5 inlet and around 25 outlet.
They are build for torque, they shift at 5300rpm, with the new smith and jones engine they rev to 7000 because they are more efficient. And gues what, they run even bigger valves.
Going to keep the head for my 850bhp build lol

Jay,

iTrader: (4)

Thats it massive ports lack torque lower down hence low response and lag .A rally x engine is designed to rev and perform its best at high rpm tapped out and anti lag takes care of pulling from a stand still

Regards Jay

Jay,

iTrader: (4)

Are they diesel ?

Regards Jay

800bhp

Stick with 1 person building/Speccing/mapping when your gone get different ideas you will end up with something that you didnt want.

smiley

Was speaking about my experience the ports on mine are more like 28-29 I have paperwork that claims it came from a jge engine it has Kent cams with big lobes looks right want to buy it?