Gtt carb

[chris]

Hi guys i have orderd a new engine for my gtt turbo because everything is completly knackerd been run short of oil any way my new engine will have a piper 270 cam a big valve head which is ported and polished and a T2/T25 turbo any advice on what i need to change on the carb and will i need a uprated fuel pump

[andybond]

AFR kit is the first port of call.

No point in running big boost if you cant get the fuelling right or you will create a big pile of engine swarf !

[J$£5GTT]

new engine? where you source that from then!?

[chris]

I say new its new to me but its fully recond as near to new as you can get i will get an afr but would i standerd carb be able to provide the fuel/air that i need

[Markey Mark (BD)]

I say new its new to me but its fully recond as near to new as you can get i will get an afr but would i standerd carb be able to provide the fuel/air that i need

If the carbs jetted correctly it will supply enough fuel for your engine ;)

[Tony Walker]

std carb stdish pressure. with those mods and std carb afrs(assuming compression is spot on) will be leaning out around 13psi imo.

[Adam 005]

I say new its new to me but its fully recond as near to new as you can get i will get an afr but would i standerd carb be able to provide the fuel/air that i need

An afr meter is a must when turning up the boost.
My advice would be get the engine in and running on O.e boost pressure run the engine in.once thats done then get your self an AEM afr set up and someone who can help you fuel the carb for the boost level you want:)

[Jonny5]

std carb stdish pressure. with those mods and std carb afrs(assuming compression is spot on) will be leaning out around 13psi imo.

I can vouch for that im getting afrs of 13.6/13.8 on boost with same mods at only 10psi.
I believe my fuel pump is tired and not helping matters tho.

[Dave Reed]

I would also save your money and not get the 'big valve, ported head'..

Blue printing the bottom end would be a good idea.

[andybond]

Chris,

The t2/25 and a standard carb @ 14psi ran lean on mine at wot.

Be careful

[chris]

Some good advise guys just out of intrest why not get the big valve head

[Dave Reed]

With the size of turbo you've gone for, I'd assumed your not going for massive power.. Anyway it's pushed in, so not so important at this stage.. Just get you manifolds match etc, a full blue print :)

[chris]

I wanted to run bout 16 psi of boost really i want bout 180 bhp at the wheels is that realistic with these mods and wheres the best place to have my car set up in the west midlands area any suggestions

[Dave Reed]

You'll get that with a standard head, but, probably need a little more boost, unless of course your going a slightly higher compression ratio (as a rough guide, that is)

No idea who's in the west Midlands, I'm from the south, and anything past watford gap is North to me ;) If Scoff is near, he's is your man for tuning??