My GT1752 Mini Sprite to be..
Turbo Mini Forums

Hey all,

Been on the forums for a while now gathering information for required parts to turbo charge my 1275 sprite engine.

So for ive compiled the following list of items.

- GT1752 SAAB 93/95 Turbo
- Mirage Motorsport manifold
- Fiesta RS Turbo Standard Intercooler
- Metro turbo carb/plenum/inlet manifold
- suitable head modifications for turbo application
- Metro turbo pistons or bore +20 and use Omega 10cc dished (unsure about this)
- Standard cam or SW5 (unsure whether standard sprite cam would cap performance)
- 123Distributor (already have one, hoping will suit my needs)
- x-pin diff & centre oil pickup. otherwise standard gearbox
- spi or mpi tank
- other bits like fuel regulator etc

With the above parts id like to get around 130hp. My guess (uneducated) is that i wont require more than 10-12 psi boost. Ill be needing a compression ratio between 8.5-9:1.

Any advice or info on the above is greatly appreciated. Maybe im expecting more than what is realistic with the above spec. Im an Electrical/Software Engineer so the mechanical side is not my area but im interested/willing to learn new things!

Anyway, heres some pictures of the car as it is at the moment. Enjoy & thanks for any advice/links to information :)

Edited by Mansfred on 18th Aug, 2012.

Nice tidy car there dude Like it

but ditch the dizzy its old tech Use Mega Jolt :) much better system as its mapable

u'll easily get that and then some with a gt17. i get 126ish so im told with a piddly t2 and 9:1 comp @10psi. with the gt17 i think you can expect 140+ish at a guess.

nice car and welcome

Thanks for the info.

Had a quick search and found this on the megajolt front

http://trigger-wheels.com/store/contents/en-uk/d33.html

Think this would suit.

With the compression, my understanding is higher compression = better driveability but less boost ability due to detonation.

Is there a possibility that I can run a higher compression ratio than 9:1 and get away with it at the setup I am proposing?

Cheers again

Tom

Well done for researching this much before posting :)

You could go higher than 9:1, the standard metro turbo was 9.4:1.

In the 13's at last!.. Just

add some hi-lows to that list too

the piccy of the engine have you got a fuel pressure reg already on that na engine?

yea t@z that is a fuel pressure regulator but dont think this cant be used for a turbo application. I thought I needed one with extra points on for fuel return to tank and also something between regulator and turbo/carb to tell it what pressure to supply fuel at?

sounds like ill probably start with a 9:1 compression ratio. I can always lower it later if I really want to pile on the boost

Just out of interest though, has anyone on here run higher than standard boost on an otherwise standard metro turbo setup?

Before this all goes into my engine bay ill be sure to get my hands on some uprated suspension and brake bits. Ive seen minispares do a 'geometry kit' (link below). Seems like a worthwhile mod. I read an article in Mini Mag where this setup had been used and setup by a guy in essex somewhere, cant recall the name but aparently the results give amazing handling!

[url]http://www.minispares.com/product/Classic/Suspension/Kits/MSSK3012.aspx?1905&ReturnUrl=/shop/classic/Suspension/Kits.aspx|Back to shop[/url]

a little update..

so ive been away collecting parts for the build. so far ive managed to get my hands on the following

Turbo Carb & Inlet (thanks bennyy)
Metro Turbo Plenum (Thanks to Danb41)
Fuel pressure reg (bennyy again)
Bailey dump valve
GT1752 Turbo (picking up in the week)
Fiesta RST Intercooler for £1.40 from ebay

ive recently been doing some work on getting a list of engine components together and hoped to get some input from the experts in here.

im wondering if i can use the omega forged +20 15cc dished pistons without any head modifications to my otherwise standard sprite head. compression ratio calcs without actually measuring anything give me a result of 8.7:1 with the above spec.

so the compression ratio would be good for what I want but does a n/a cylinder head need other mods to suit a turbo (larger valves or double valve springs maybe??)

My plan is now to use the avonbar ph2 cam if that makes any difference and I still only want to start out with 10-12psi max.

Cheers for any input on this

Tom

Yes i moved to the darkside

Instagram @jdm_brett