Kuwaiti 370ci TC76 l92 max safe power
06-29-2012, 05:45 AM
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Kuwaiti 370ci TC76 l92 max safe power Alright so a week ago i bottoned up my forged 346ci/241heads turbo set up which saw more than 15 hard pulls on the dyno to dial everything up with no problems, but lifted the heads and broke the water jacket on the #7 cylinder the next day on the street. It put down 716rwhp/720rwtq on 17psi
Head stud kit
Cometic gaskets
-11 weisco pistons
Callies rods
ACL bearings
Speed inc TU1 cam
Now i'm stepping up to the 6.0 4.030 bore iron block forged -11 pistons forged rods, full stud kits (heads,con rods,main) cometic gaskets, l92 heads, TU1 cam.
My questions are:
1what happened to the first set up?
2- how much would this set up put down on 93 octane safely?
3- any tuning tips (i'm not a tuner)
4-any other tips.
Head stud kit
Cometic gaskets
-11 weisco pistons
Callies rods
ACL bearings
Speed inc TU1 cam
Now i'm stepping up to the 6.0 4.030 bore iron block forged -11 pistons forged rods, full stud kits (heads,con rods,main) cometic gaskets, l92 heads, TU1 cam.
My questions are:
1what happened to the first set up?
2- how much would this set up put down on 93 octane safely?
3- any tuning tips (i'm not a tuner)
4-any other tips.
Last edited by black-sinner; 06-29-2012 at 05:50 AM.
06-29-2012, 06:30 AM
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Hello ,
I am sorry that happend to you.
I am not an expert but i know some rules and
Most of heads lift caused by the rise in (egr).
Do you have the dyno graph ?
What is head gasket thikness?
Did you count the quench aerea?
How much timimg you went and what afr you got and what octain did you used ?
I am sorry that happend to you.
I am not an expert but i know some rules and
Most of heads lift caused by the rise in (egr).
Do you have the dyno graph ?
What is head gasket thikness?
Did you count the quench aerea?
How much timimg you went and what afr you got and what octain did you used ?
06-29-2012, 07:31 AM
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06-29-2012, 07:42 AM
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Hello ,
I am sorry that happend to you.
I am not an expert but i know some rules and
Most of heads lift caused by the rise in (egr).
Do you have the dyno graph ?
What is head gasket thikness?
Did you count the quench aerea?
How much timimg you went and what afr you got and what octain did you used ?
I am sorry that happend to you.
I am not an expert but i know some rules and
Most of heads lift caused by the rise in (egr).
Do you have the dyno graph ?
What is head gasket thikness?
Did you count the quench aerea?
How much timimg you went and what afr you got and what octain did you used ?
My gaskets are .51 and my a/r ratio was 11.5:1 and total timing was 15* , my dyno graph shows a sharp drop from 5500 rpm
06-29-2012, 07:57 AM
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exhaust gas recirculationdum(EGR)
" The general feeling is that the total (quench) or squish distance should be counted upon your app, The quench distance is the compressed thickness of the head gasket plus the deck clearance. The quench area is the flat part of the piston that would contact a similar part of the head if you had .000 assembled quench height".
" The general feeling is that the total (quench) or squish distance should be counted upon your app, The quench distance is the compressed thickness of the head gasket plus the deck clearance. The quench area is the flat part of the piston that would contact a similar part of the head if you had .000 assembled quench height".
Last edited by Ls-x; 06-29-2012 at 08:24 AM.
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06-29-2012, 09:15 AM
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06-29-2012, 11:06 AM
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Lifting the heads is usually the tune/bad fuel especially since you didnt run anything over 17psi.
Is your car an auto or manual?
I thought you guys have 98octane in Kuwait? Have you thought about adding a meth kit?
If you're planning to run straight 93 pump gas then keep the comp of the engine under 9.5
Any pics or dyno graph?
Is your car an auto or manual?
I thought you guys have 98octane in Kuwait? Have you thought about adding a meth kit?
If you're planning to run straight 93 pump gas then keep the comp of the engine under 9.5
Any pics or dyno graph?
06-29-2012, 11:52 AM
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1. TC76 the turbine wheel is only a 68mm, to small that's why your power drops off.
2. many of the problems related to broken pistons, lifted heads, etc are related to uncontrolled combustion like detonation. From to much timing, lean tune, running out of injector or fuel pump.
3. I've never heard quench being a issue on a ls motor running reverse dome or flat top pistons on stock heads and stock stroke.
4. Nothing wrong with exhuast ports on stock heads, aftermarket heads flow better and depending on type have thicker casting. What does that mean? better flow means better potential to make power. Thicker casting? Meansless likely to lift a head because the deck is thicker. .750 for thick deck castings vs .500 for a stock casting.
2. many of the problems related to broken pistons, lifted heads, etc are related to uncontrolled combustion like detonation. From to much timing, lean tune, running out of injector or fuel pump.
3. I've never heard quench being a issue on a ls motor running reverse dome or flat top pistons on stock heads and stock stroke.
4. Nothing wrong with exhuast ports on stock heads, aftermarket heads flow better and depending on type have thicker casting. What does that mean? better flow means better potential to make power. Thicker casting? Meansless likely to lift a head because the deck is thicker. .750 for thick deck castings vs .500 for a stock casting.
06-29-2012, 01:06 PM
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1. TC76 the turbine wheel is only a 68mm, to small that's why your power drops off.
2. many of the problems related to broken pistons, lifted heads, etc are related to uncontrolled combustion like detonation. From to much timing, lean tune, running out of injector or fuel pump.
3. I've never heard quench being a issue on a ls motor running reverse dome or flat top pistons on stock heads and stock stroke.
4. Nothing wrong with exhuast ports on stock heads, aftermarket heads flow better and depending on type have thicker casting. What does that mean? better flow means better potential to make power. Thicker casting? Meansless likely to lift a head because the deck is thicker. .750 for thick deck castings vs .500 for a stock casting.
2. many of the problems related to broken pistons, lifted heads, etc are related to uncontrolled combustion like detonation. From to much timing, lean tune, running out of injector or fuel pump.
3. I've never heard quench being a issue on a ls motor running reverse dome or flat top pistons on stock heads and stock stroke.
4. Nothing wrong with exhuast ports on stock heads, aftermarket heads flow better and depending on type have thicker casting. What does that mean? better flow means better potential to make power. Thicker casting? Meansless likely to lift a head because the deck is thicker. .750 for thick deck castings vs .500 for a stock casting.
06-29-2012, 01:32 PM
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1. TC76 the turbine wheel is only a 68mm, to small that's why your power drops off.
2. many of the problems related to broken pistons, lifted heads, etc are related to uncontrolled combustion like detonation. From to much timing, lean tune, running out of injector or fuel pump.
3. I've never heard quench being a issue on a ls motor running reverse dome or flat top pistons on stock heads and stock stroke.
4. Nothing wrong with exhuast ports on stock heads, aftermarket heads flow better and depending on type have thicker casting. What does that mean? better flow means better potential to make power. Thicker casting? Meansless likely to lift a head because the deck is thicker. .750 for thick deck castings vs .500 for a stock casting.
2. many of the problems related to broken pistons, lifted heads, etc are related to uncontrolled combustion like detonation. From to much timing, lean tune, running out of injector or fuel pump.
3. I've never heard quench being a issue on a ls motor running reverse dome or flat top pistons on stock heads and stock stroke.
4. Nothing wrong with exhuast ports on stock heads, aftermarket heads flow better and depending on type have thicker casting. What does that mean? better flow means better potential to make power. Thicker casting? Meansless likely to lift a head because the deck is thicker. .750 for thick deck castings vs .500 for a stock casting.
like you mentioned that problems related to uncontrolled combustion can cause head lift so a main reason for detonation is going to a vrey slim thikness without using a proper fuel or if you just increase the cylinder pressure by adding boost to it.
so in reality no one can confirm the reason behind the head lift without knowing all the building details and tuning process because there is many factors that will cause this problem .
06-29-2012, 01:45 PM
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A 75mm GTS wheel chokes a gen1 355 at 5k & 15+.
What do you think a 68mm F1 wheel will do?
You want at least an S wheel for a 370 for only 750ish fwhp. An 87/80mm or bigger turbine prefered
What do you think a 68mm F1 wheel will do?
You want at least an S wheel for a 370 for only 750ish fwhp. An 87/80mm or bigger turbine prefered
06-29-2012, 03:37 PM
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But ofcourse undersized turbine wheel is NOT the cause for my engine breaking, right??