as above what should i expect from my s1 with the bits listed....

low comp bottom end with steel rods ect
stage3 big valve head
stage3 t3 .48 from cr turbos
fully ported and cross matched inlet with (efi or custom inlet plenum)
newman cam with solid lifters and double valve springs
gotech mfi
dark greens
044 fuel pump
airtech rad and front mount intercooler
airtech tubular manifold
ect ect

what power would it make with either inlet fitted so i can compare ect

and what boost levels are realistic for the spec as some say i could max out the turbo at 28psi and some say i can run like 25psi peak and others have said i need different injectors....

advise would be great guys thanks

 

I would imagine at least 260 mate, maybe more like 270?

Rob

 

well thats great news i would be chuffed to bits if i made around the same as karlos's car sort of 230bhp that would be lovely

but do i keep my inlet or put my efi one on

 

Karlos is limited heavily by his turbo, with a stage 3 he would be making the power above im sure. Not sure on inlet mate but im sure some one will tell you.

Have you built the engine yet?

Good luck

Rob,

 

yeh its in the car just need to finishing the loom and it will be running but its fitted with a piper 285t and i want a better cam so it can make the numbers so thats why im thinking of selling my inlet

 

I would agree with you rob about 250-270.

 

standard mfi inlet is capable of 300+bhp you will just need to modify it for electronic injectors or swop the lower part for an efi one

 

well i have a fully ported efi unit aswel so thats what i was thinking of using or the big inlet its fitted with

 

Not sure it really matters that much tbh mate.... i have heard rumours that the mfi manifold flows better than the efi??? but i have no proof to back it up. It would be easier for sure to use the efi manifold as (like botters said) you will need to get the mfi machined to except efi injectors.

Rob,

 

so will the top half of a mfi s1 inlet fit a efi inlet manifold because then i wont even need a throttle cable or charge pipe just bolt in

 

Apparently not mate, but i have never had a decent look at it.

Rob,

 

well ive painted up a efi inlet thats fully ported ect so thats what im going to fit

 

Thats what i would have done mate, nice and easy

 

Either inlet is fine for 300bhp+, with good mapping 270-280bhp is possible although your engine being low comp it may be a little less
Cant remember what dark greens flow for but if it isnt enough then loose them and buy some 630cc Siemens Deka IV's they are a modern injector with a better spray pattern and are high impedance (longer life, less electrical noise) and about half the price of the greens!!

 

i would say anything from 250-80hp as you have the turbo and rods to run it,mfi and efi inlets can and have produced 300+hp

 

thats what im going to do then and if i dont sell the inlet it can go on my missus mk1 fieata rst that we are gunna start building soon