118 replies to this topic

[XE-VX]

[TFD]

I think you should see tuning in perspective. Take the Z22SE engine for instance. I think there are only a handfull of people (well, on fora that is..) that push the engine over its limits. And even when it blows, its most of the time hard to find the real cause. So talking about what is possible and what is not, is not fair or even possible because the resources and experiences are pretty limited. And as long as the majority of people keep the limit on 250 bhp because GM says so... well.. For good reason of course, I dont have the time and money to be a guinuapig either lol.

[CHILL Gone DUTCH]

By looking at that car it Dosent do many miles on the road or track But she is a beauty

[XE-VX]

[CHILL Gone DUTCH]

I had a boy crush on a manta I passed everyday on the way to school

[Mangham54]

It may be a real peice of kit, but I am sorry but that Manta does nothing at all for me.

[stu8v]

Kadette C's are even better but hard to get hold of.

 

 

[Exmantaa]

Well, I used to have something similar like that C20LET engine, but then wrapped in a 1972 A-manta shell.

[Chris P Duck]

I think you should see tuning in perspective. Take the Z22SE engine for instance. I think there are only a handfull of people (well, on fora that is..) that push the engine over its limits. And even when it blows, its most of the time hard to find the real cause. So talking about what is possible and what is not, is not fair or even possible because the resources and experiences are pretty limited. And as long as the majority of people keep the limit on 250 bhp because GM says so... well..

For good reason of course, I dont have the time and money to be a guinuapig either lol.

From memory these limits were found by increasing the power until stuff broke. With nitrous oxide so not 100% the same as a SC but should be similar. I also understand Joe fooked a rod running 270 which seems to back up the stated limit of 250 for the rods.

Edited by Chris P Duck, 20 July 2015 - 10:19 PM.

[Rosssco]

The build book, by the fact it was written by GM themselves, will always be slightly conservative in its estimates for failure limits..

[TFD]

I understand were the numbers come from. Thing is that one limit is not the other one... Some Z22 will be fcuked at 200bhp due to whatever error, another will survive 300 bhp without any problems.

Because one (as in "not a lot") person breaks something at a certain powerlevel doesnt mean that that powerlevel is the one and only limit. One Z22 breaking a rod at 250 bhp is (can be) an accident, a hundred Z22's breaking a rod at 250 bhp is patern.

[Andrew aka Stuwy]

[many pics]  

 

Looks lovely but those wheels don't go IMO

[smiley]

another will survive 300 bhp without any problems.

 

 

Sounds like you´re going to up the boost on yours now?

[Rosssco]

 

another will survive 300 bhp without any problems.

 

 

Sounds like you´re going to up the boost on yours now?

 

 

His might survive ~300ish, but only because he's using a turbo..  

[smiley]

 

 

another will survive 300 bhp without any problems.

 

 

Sounds like you´re going to up the boost on yours now?

 

 

His might survive ~300ish, but only because he's using a turbo..  

 

 

On a stock Z22SE?

[Rosssco]

 

 

 

another will survive 300 bhp without any problems.

 

 

Sounds like you´re going to up the boost on yours now?

 

 

His might survive ~300ish, but only because he's using a turbo..  

 

 

On a stock Z22SE?

 

 

Maybe?? If we make the assumption that ~270bhp was the limit(ish) on a supercharged Z22SE, then accounting for roughly ~10% parasitic drive loss for the SC, then the actually power limit maybe be closer to ~300bhp..

 

That's a very basic assessment, but I guess TFD will tell us if / when he gets close to that..

 

Meant to say, rod strength has got a lot to do with torque, and perhaps torque delivery, so maybe we should be talking about that rather than just power (and yes, I know power is just torque x engine speed, but still..)  

Edited by Rosssco, 21 July 2015 - 04:20 PM.

[TFD]

I'm sorry guys.. my turbo flows max 240-250whp or ~280ish bhp. 250whp is roughly 300bhp on a sc though. On cobalt forum are enough people pushing 240-250whp with their turbo setup. Guess both sc and turbo can push 280bhp on the engine but the turbo is lighter and puts more hp to the wheels so faster. We'll see in a few weeks ;-)

[smiley]

We'll see in a few weeks ;-)

 

Interesse is gewekt.

cpz lot?

[TFD]

Sorry, holiday in Sweden...