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Introduction and Bolt-On Cobra Jet Intake Install/Dyno
- Thread starter SmokeGreyHatch
- Start date
Looka good. Where are people getting the manifold at right now?
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I have to hand it to Shaun. For a custom combo, base tune is awesome. Drivability of the SCJ TB is BETTER yes BETTER than stock. It is technically upside down for two reasons: better fitment of the TB motor to heater hose clearance and the throttle blade opens as the stock blade does when the SCJ TB is upside down. I wanted the same blade opening characteristics to divert airflow appropriately. I was totally expecting cammed like drivability and it is DIALED. Thanks, Shaun!
I just got done datalogging on 91 and it pulls like a raped ape above 4500-5000. Crazy hard. Keeps pulling to 7700 where I stopped. Minimal torque loss down low, but you can feel it. I haven;t driven a bolt on boss 302 IM car, but it's probably similar. Need to revise these and spend some time dialing in the E85 tune. My business schedule is crazy over the next few months so I'll probably just dial in the car remotely and schedule some dyno time locally with a buddy. We can then remote session Shaun in and make the final TiVCT changes for optimal power. More to come. :beer:
Matt
I just got done datalogging on 91 and it pulls like a raped ape above 4500-5000. Crazy hard. Keeps pulling to 7700 where I stopped. Minimal torque loss down low, but you can feel it. I haven;t driven a bolt on boss 302 IM car, but it's probably similar. Need to revise these and spend some time dialing in the E85 tune. My business schedule is crazy over the next few months so I'll probably just dial in the car remotely and schedule some dyno time locally with a buddy. We can then remote session Shaun in and make the final TiVCT changes for optimal power. More to come. :beer:
Matt
Very nice man , looks clean. This will be helpful for when I do the CJ manifold.
When do you plan on hitting the Dyno?
When do you plan on hitting the Dyno?
Probably in 2-3 weeks
Nice...Sub'n
Just using my buddy's shop in AZ for dyno use and Shaun will be dialing in the TiVCT remotely via email/phone. The air in AZ sucks, 3500-4000 DA this time of year, but we'll see how SAE goes.
I want to see the graphs on this intake when done, this thing is suppose to have a higher power band than the BOSS with no loss of tq down low.
Just did another log on a revision, and the load is showing peak torque at 5650 rpm. How does that compare to a boss IM car? It sure does carry out the torque nicely 
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Peak torque is at around 4800rpm with boss manny. It was 371 with stock and down to 343 with boss. It was an expensive lesson learned. I gained only about 8hp. Sold it and mounted a roush tvs.
What are the boss IM, exhaust, MT82 cars logging in MAF lb/min?
Playing around in Excel, here is what the power curve looks like based on MAF lb/min in relation to load (torque). Tried to scale it so they meet at 5252
what rpm are you at the end of fourth? do you have to shift into 5th to finish a 1/4 mile?
I still haven't installed the 3.90's, but if the car traps 125 mph on E85 like I want it to then it'll be 7700 through the traps on a 28 inch tire (4th is 1.32:1)
Mine made a peak of 45.69 lb/min at 7600 rpm.
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