--->jkenefic version 3.0 build<---
06-05-2008, 05:49 PM
#142
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I think the key point here is not if L19 will provide more clamping force, but will that clamping force be applied evenly, consistantly, over the life of the engine. I think the TTY alternitive is a great way to garentee consistant clamping pressure.
The main difference and the reason why you cant compare the VQ to other platforms is that people never re-torque studs after heat cycles. I think it may be a reason why we get inconsistant resaults across all builds. I think the key here is preparation and expert installation of the head studs. I think it is a critical factor.
With hondas, we dont even get an L19 option. Standard arps have been used for upto 40psi of boost. Reliable as hell. Full alluminium open deck. But a recommend practice is a copper (spray) coated OEM gasket. I remmber the first headgasket i ever replaced, i used an aftermarket OEM style. Fresh ARP studs. That thing didnt even last the end of the street, instance head lift. Next time around i used a OEM gasket and copper coated it. Reused and aded a few more ft-lbs of torque to the ARPs. IT didnt headlift until i had holes in the pistons.
The main difference and the reason why you cant compare the VQ to other platforms is that people never re-torque studs after heat cycles. I think it may be a reason why we get inconsistant resaults across all builds. I think the key here is preparation and expert installation of the head studs. I think it is a critical factor.
With hondas, we dont even get an L19 option. Standard arps have been used for upto 40psi of boost. Reliable as hell. Full alluminium open deck. But a recommend practice is a copper (spray) coated OEM gasket. I remmber the first headgasket i ever replaced, i used an aftermarket OEM style. Fresh ARP studs. That thing didnt even last the end of the street, instance head lift. Next time around i used a OEM gasket and copper coated it. Reused and aded a few more ft-lbs of torque to the ARPs. IT didnt headlift until i had holes in the pistons.
Last edited by Weqster; 06-05-2008 at 05:52 PM.
06-05-2008, 07:29 PM
#143
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Wow, I can't believe I have missed this thread.
I have been planning on going the same route, HR Gaskets, Headstuds and even Mainstuds. I was turned onto the HR gaskets after being told about them by theHawk408. I also talked to Sharif who informed me he was working on a car with this proposed setup. It's good to know it is holding the power without a sweat. Would love to see some long term results in a couple months. Congrats.
I have been planning on going the same route, HR Gaskets, Headstuds and even Mainstuds. I was turned onto the HR gaskets after being told about them by theHawk408. I also talked to Sharif who informed me he was working on a car with this proposed setup. It's good to know it is holding the power without a sweat. Would love to see some long term results in a couple months. Congrats.
06-18-2008, 06:20 PM
#147
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Yes, as you can see the coolant flow is redirected to the exhaust ports to aid in cooling that portion of the heads... And that middle layer is a fire ring preloader that aids in sealing the combustion chambers under elevated cyl. psi.
Just another update, 4000 miles later and still no signs of head lift and no air in the cooling system. I have done several 3-4-5 gear pulls and now that it is hot outside my coolant temps still never get above 195 while the car is moving and 210 while sitting in traffic.
Just another update, 4000 miles later and still no signs of head lift and no air in the cooling system. I have done several 3-4-5 gear pulls and now that it is hot outside my coolant temps still never get above 195 while the car is moving and 210 while sitting in traffic.
06-18-2008, 07:17 PM
#148
Originally Posted by jkenefic
Yes, as you can see the coolant flow is redirected to the exhaust ports to aid in cooling that portion of the heads... And that middle layer is a fire ring preloader that aids in sealing the combustion chambers under elevated cyl. psi.
Just another update, 4000 miles later and still no signs of head lift and no air in the cooling system. I have done several 3-4-5 gear pulls and now that it is hot outside my coolant temps still never get above 195 while the car is moving and 210 while sitting in traffic.
Just another update, 4000 miles later and still no signs of head lift and no air in the cooling system. I have done several 3-4-5 gear pulls and now that it is hot outside my coolant temps still never get above 195 while the car is moving and 210 while sitting in traffic.
210 is kind of high isn't it? I usually see 96C in traffic.. No oil cooler either..
06-18-2008, 08:11 PM
#150
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Originally Posted by leeboyNY
210 is kind of high isn't it? I usually see 96C in traffic.. No oil cooler either..
not even close! my 08 stock 4 banger toyota truck runs about 193 with ac on.
11-04-2008, 05:19 AM
#154
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But as far as head lift or cooling is concerned I have had absolutely zero issues, the motor has just under 9000 miles on it now and I leave the boost controller at 19psi all the time (626whp on DD). So this is being tested at my max power level on a daily basis, made it through the first season without a hitch, and I would expect nothing to develop at these power levels in regards to the head gaskets or head bolts.
11-04-2008, 10:08 AM
#158
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Good to hear Mad Scientist....You said the Plenum cracked. I take it because you said you had it welded you are not talking about the caps....where exactly did it crack??
11-04-2008, 10:31 AM
#159
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I remember because I have a Crawford and I want a Cosworth... Like everyone else here, I suppose...
