LT1 Mini Project . . .

[Roadkill]

O.K, the plan is to Turbo the LT1.

Problem is the C/R is too high to run a decent amount of boost.

So I need to reduce C/R.

SO I start looking at heads - namely Edelbrocks 54cc heads and Dart 58cc heads and AFR 55cc heads - all of which create a compression ratio of well over 10:1.

O.K - fair enough - so I start looking at Pistons . . . (obviously as low as possible) . . .

I find SRP low compression (forged) ones . . . they STILL give me over 10:1 !



I've not got a massive choice of heads, here - In fact the above three are the only ones I've found.

By the looks of it I need to be finding a head with a combustion chamber at around 76cc !

[55starchief]

have a look at trick flow, they have a 62cc head for the LT1

http://www.trickflow.com\" target=\"_blank\" rel=\"nofollow\">http://www.trickflow.com

[F Body]

Your too modest Mr RK, this is NOT a mini project !

This IS a PROJECT

[Roadkill]

Quoting: 55starchief

have a look at trick flow, they have a 62cc head for the LT1

http://www.trickflow.com

\" target=\"_blank\" rel=\"nofollow\">http://www.trickflow.com

[Roadkill]

If the turbo option is looking to turn into high budget I'd prefer to go the other way and beef up what I've got, add a roller cam, lifters and rockers etc . . and stay N/A.

[55starchief]

Let me make some enquires im pretty sure a deep dish piston would be the solution, maybe with a stroker kit to increase displacment. You could also try i thicker head gasket

[yorkshirespud]

10:1 isn't far off acceptable compression ratio for turbo/supercharging.
The Porsche Cayenne turbo has a CR of 9.5:1 (the base aspirated model is around 12:1)

I'm thinking my resbuild will end up around 9:1, leaving some room for charging later if i want (possibly with an intercooler though)

[Roadkill]

Link dump :

http://cgi.ebay.com/ebaymotors/clutch-slave-and-master-lt1-6-speed-camaro-and-firebird_W0QQcmdZViewItemQQcategoryZ33733QQihZ008QQitemZ180243131575QQrdZ1QQsspagenameZWDVW\" target=\"_blank\" rel=\"nofollow\">http://cgi.ebay.com/ebaymotors/clutch-slave-and-master-lt1-6-speed-camaro-and-firebird_W0QQcmdZViewItemQQcategoryZ33733QQihZ008QQitemZ180243131575QQrdZ1QQsspagenameZWDVW

[Roadkill]

Quoting: yorkshirespud

10:1 isn't far off acceptable compression ratio for turbo/supercharging.
The Porsche Cayenne turbo has a CR of 9.5:1 (the base aspirated model is around 12:1)

My aim is no higher than 9.5:1.

We'll see what we can find . . .

[yorkshirespud]

Quoting: Roadkill

My aim is no higher than 9.5:1.

We'll see what we can find . . .

Mr Porker would seem to agree with you!

[Roadkill]

Fingers crossed I can find a pair of heads for around $1500 (or less).

The Dart's would be my first choice, followed by the Edelbrocks - but C/R's just too high unless some serious dished pistons can be found.

[art b]

sounds like it could get expensive,
how much power could ya get with some mods and tuning,

considering its gonna be a ball-ache/expensive  job getting a turbo in to begin with

[Pod]

That's a good point.

How much power and what overall cost for turbo vs n/a options?

[55starchief]

N/A and streetable you could make 450-500 but its gonna be as expensive as the turbo option which will make 700hp+

[Roadkill]

I'd expect, initially, around 600Bhp from the Turbo kit - but there's more potential there with other mods.

[FUBAR]

Quoting: art b

how much power could ya get with some mods and tuning,  

If you're looking into "normal" LT1 mods, check here:

http://www.tpis.com/index.php?toggleCatalog=1&module=shop_online\" target=\"_blank\" rel=\"nofollow\">http://www.tpis.com/index.php?toggleCatalog=1&module=shop_online

[CJ-IROCZ]

Quoting: Roadkill

600Bhp

you can never have to much power

[55starchief]

Ok a quick call to andy and he has said dish pistons are the way to go, expect to pay $700 for off the shelf but if you cant find what your looking for customs will run abut $850 and you can have any dish you want

http://www.ariaspistons.com/products/chevrolet.html\" target=\"_blank\" rel=\"nofollow\">http://www.ariaspistons.com/products/chevrolet.html

http://www.wiseco.com/Catalogs/Automobile.aspx\" target=\"_blank\" rel=\"nofollow\">http://www.wiseco.com/Catalogs/Automobile.aspx

[F Body]

Quoting: 55starchief

he has said dish pistons are the way to go

Aren't you going to have combustion issues using dished pistons ?

May be OK under high turbo pressure, but I'd think you could have problems at tick over / low revs unless you still dump loads of fuel in ?

[55starchief]

Nope should be fine, even with 8-1 CR it would still tick over just fine, the problem will be detonation at a higher CR when on boost

[Titsy]

Quoting: 55starchief

Ok a quick call to andy

Andy does answer his phone once in a while then...

[55starchief]

Quoting: Titsy

Andy does answer his phone once in a while then...

yup, i can nearly always get hold of him

[Titsy]

Does he have caller display then? So's he knows when not to answer calls from disgruntled customers...

[Incursus]

Quoting: 55starchief

Quoting: Titsy
Andy does answer his phone once in a while then...

yup, i can nearly always get hold of him

Quoting: Titsy

Does he have caller display then? So's he knows when not to answer calls from disgruntled customers...

I can only assume so as I've called minutes after Graeme an still not got through.

And shock horror he's still ignoring my emails

[55starchief]

Caller id wouldnt show if it was outside of the US, so he would have no idea who was calling, much the same as if the person calling in the US had their number hidden so i doubt its that