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<blockquote data-quote="Talleywacker" data-source="post: 16416848" data-attributes="member: 18068"><p>Hey there. First off great to see you tracking your cobra. Much love to ya there. I got my cobra last year from the original owner my uncle. I'll give you some advice and some insight onto the build of my car. My car is a 12k mile cobra with about 9k miles of open track abuse. Very little street miles... first 1k was on the street so in 11k miles only about 2k are on the road.</p><p></p><p>My cobra has been extensively modded for the track. It's a trailer queen dedicated road race car. Years and years of trial and error that my uncle endured to get the car to where it is now. The car has ran in 90f heat for 40 minute sessions at gingerman and mid ohio. My first event last year in houston was 94f heat and I did 20 minute sessions and never skipped a beat. Now this is of course depending on the driver... I'm a novice but my uncle was an instructor. He drove it hard and dealt with heat issues until he came up with the combo that is on the car now that allowed him to run 40 minute sessions without issues.</p><p></p><p>Here is my car cooling setup:</p><p></p><p>2.3 gen2 whipple (cooler discharge vs eaton) 14psi 570rwhp/520rwtq</p><p>afco h/e</p><p>fluidyne radiator</p><p>lethal gen2 head cooling mod</p><p>bypass hose delete</p><p>thermostat delete</p><p>AC delete</p><p>Evans coolant</p><p></p><p>So this is where he modded the car to. The car can/will go into limp mode above 240f coolant temps. I think mine has been tuned to 235. Same thing for iat2... I think stock it's rated 200f it'll go into limp mode.</p><p></p><p>So your a tech so obviously do the compression and leakdown. It could very well be a head gasket issue. However, my uncle had the same experience you had where he couldn't do more than 2-3 hard laps before he would have to back way off. The evans coolant he said was a big contributor along with the head cooling mod. The lethal design brings the hot cyl 7/8 coolant out of the head and brings it directly back to the radiator via a splice in the upper tube. There is no more recirculating/mixing hot coolant with cool due to the bypass delete and the thermostat delete was the final thing he did. I'm not sure if he has a restrictor plate in the hose or not but I don't think he does.</p><p></p><p>My other uncle is a ford tech and they both tore the motor down around 8-9k miles to the shortblock to inspect the cylinders and to install the head studs and new timing assembly. New water and oil pumps too. Everything looked very clean and they deemed the motor acceptable.</p><p></p><p>The cobra had 11,646 miles when I bought it and immediately did new plugs/coils and I did a compression test then and got 180 on 6 cylinders and one had 175 and one had 185. I believe this falls within the ford spec.</p><p></p><p>Let me know if there is any questions. Hope you get it corrected because tracking the cobra is simply amazing!</p></blockquote><p></p>
[QUOTE="Talleywacker, post: 16416848, member: 18068"] Hey there. First off great to see you tracking your cobra. Much love to ya there. I got my cobra last year from the original owner my uncle. I'll give you some advice and some insight onto the build of my car. My car is a 12k mile cobra with about 9k miles of open track abuse. Very little street miles... first 1k was on the street so in 11k miles only about 2k are on the road. My cobra has been extensively modded for the track. It's a trailer queen dedicated road race car. Years and years of trial and error that my uncle endured to get the car to where it is now. The car has ran in 90f heat for 40 minute sessions at gingerman and mid ohio. My first event last year in houston was 94f heat and I did 20 minute sessions and never skipped a beat. Now this is of course depending on the driver... I'm a novice but my uncle was an instructor. He drove it hard and dealt with heat issues until he came up with the combo that is on the car now that allowed him to run 40 minute sessions without issues. Here is my car cooling setup: 2.3 gen2 whipple (cooler discharge vs eaton) 14psi 570rwhp/520rwtq afco h/e fluidyne radiator lethal gen2 head cooling mod bypass hose delete thermostat delete AC delete Evans coolant So this is where he modded the car to. The car can/will go into limp mode above 240f coolant temps. I think mine has been tuned to 235. Same thing for iat2... I think stock it's rated 200f it'll go into limp mode. So your a tech so obviously do the compression and leakdown. It could very well be a head gasket issue. However, my uncle had the same experience you had where he couldn't do more than 2-3 hard laps before he would have to back way off. The evans coolant he said was a big contributor along with the head cooling mod. The lethal design brings the hot cyl 7/8 coolant out of the head and brings it directly back to the radiator via a splice in the upper tube. There is no more recirculating/mixing hot coolant with cool due to the bypass delete and the thermostat delete was the final thing he did. I'm not sure if he has a restrictor plate in the hose or not but I don't think he does. My other uncle is a ford tech and they both tore the motor down around 8-9k miles to the shortblock to inspect the cylinders and to install the head studs and new timing assembly. New water and oil pumps too. Everything looked very clean and they deemed the motor acceptable. The cobra had 11,646 miles when I bought it and immediately did new plugs/coils and I did a compression test then and got 180 on 6 cylinders and one had 175 and one had 185. I believe this falls within the ford spec. Let me know if there is any questions. Hope you get it corrected because tracking the cobra is simply amazing! [/QUOTE]
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