I have a '00 2.4l and I was wondering what you guys think about using an 086 head or the 2.4l head w/ HO mani. I'm going to run around 20psi with a o-ringed block. I have the bottom fully built, knife edged & balanced, balance shafts removed, 2.3l oil pump swap, eagle rods. I know that the CR will be raised and would then need like 8.5:1 pistons to end up with like a 10:1 or so. However at 20psi this would be a bad combo. I was really hoping to get closer to 8.5:1 and then make up the lost power with higher boost.
Anyway, my question is this, will the 2.4l head flow as good or close to the 086 with the 1mm oversized valves in it? and of course a good P&P job?
No it won't if you go to turbotechracing.com they sell a ported 2.4 head with 1mm oversized valves and they show the flow #'s. I tried to put the link to the flow sheet in but it didn't work. Anyway the ported 2.4 head flows like 136 @.400 vs 125@.400 stock but the exhaust side is almost 20 cfm better than stock. However a stock 086 flows like 250 @.400 I and 190's @.400 E, so you will be far better off with the 086 head.
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Our Products: Chevrolet > Cavalier > 2000 > Engine Internals
Turbo Tech Racing Port and Polished Cylinder Head Package Cavalier/Sunfire 1996-02 2.4L
SKU: TTR10000
Brand: Turbo Tech Racing
Turbo Tech Racing performance cylinder heads, are first pressure checked, and cleaned. The old valve train is removed from the cylinder head. From there we surface the head to ensure the best seal possible. We then do a mild porting and polishing installing our special stainless steel polished swirl valves and bronze valve guides. New valve seals are also installed. This head has great mid and upper range power without losing low end torque. Works with stock ECU. After port and polishing Turbo Tech Racing’s cylinder head shows an increase flow of over 8 % @ .400 lift (intake) and over 20 % @ .400 lift (exhaust.) Click here to view the flow test information. Please email us with your inquires on all other heads for price quote. Personalized flow test sheets can be done for an additional $125. Price includes refundable $100 core charge.
2000 Z24 5spd header & catback for now.
Is there a way to get it down to 8.5:1 - 9:1 using the 086 head without using a crappy head spacer? Is there a good head spacer that will take the boost and not dick with the timing too bad?
Cometics head gasket?
Scott
When I boost, you boost, we boost
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You have been banned from NEJBODY.
You've displayed wayyy too many acts of pushing people to their limits.
It's never cool to tear people down for what they want to do.
NEJBODY is a team. We're not the same as JBO where everyone bashes on eachother.
I'm surprised you show up to our meets after half of the things you say on here.
Just tell Wiesoc that you want 7:1 cr pistons for a 2.4 because with the 086 head it raises the cr 2 full points I believe, someone correct me if I'm wrong. However I'm in the process of building the exact same engine as you but I'm going to get 8.5:1 pistons so my cr with the 086 head will be 10.5:1 so untill boost kicks in the engine won't be a lazy dog.
2000 Z24 5spd header & catback for now.
OK, you've convinced me......this is good a direct answer is what I needed. Next, given an 086 head, what can be/ shoudl be done with cam towers and cams, "secret cams" with 2.4l cam towers good? Do I need different lifters with the 086 head?
You guys are great. Soon I'll have my way paved
Dale Young wrote:Just tell Wiesoc that you want 7:1 cr pistons for a 2.4 because with the 086 head it raises the cr 2 full points I believe, someone correct me if I'm wrong. However I'm in the process of building the exact same engine as you but I'm going to get 8.5:1 pistons so my cr with the 086 head will be 10.5:1 so untill boost kicks in the engine won't be a lazy dog.
Why not just port out the 2.4 Cylinder Head and not have to play games with running a good compression for boost? To me, it seems like too much of a headache to play guessing games and getting custom pistons just so your run an ok C/R. I'm sure a very good port job will be suffice for a turbo setup on a 2.4 and will probably flow as well as you need for the power you're looking for.
Also, the point of lower the compression on a turbo'd vehicle is so that you are relying on the turbo more and make tuning easier, hence why people are able to run high PSI on lowered compression...they need to in order to make power. As far as your car being a lazy dog, if you matched the turbo to your motor well, you should be in boost very easily.
Quote:
Cometics head gasket?
Yeah, I was gonna say a thicker head gasket but I don't think that would be such good a good idea because of the timing chain.
www.kronosperformance.com / 732-742-8837
With a 086 head, you would need a piston with a dish of 20cc to get 9:1 compression and a dish of 25.2cc for 8.5:1 compression.
All that with a piston that is 0.030 over.
The head gasket is the same thickness as stock.
Gilles
2.3 Ho
NJHK a ported 2.4 head doesn't flow anywhere near a stock 086 head, that's why I'm going that route, more airflow in/out means more hp/tq.
2000 Z24 5spd header & catback for now.
