Cobra Jet intake install

[mustang_guy]

great job. :cheers: Could you post the da and temp for us other drag nuts? I meant to ask this from your last slip.

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[Todd15Fastback]

great job. :cheers: Could you post the da and temp for us other drag nuts? I meant to ask this from your last slip.

DA was -655 based on the date and time of his times lip at 131 Motorsports Park.

 

[mustang_guy]

DA was -655 based on the date and time of his times lip at 131 Motorsports Park.

Thanks

 

[RBS550]

DA was -655 based on the date and time of his times lip at 131 Motorsports Park.

Thanks for updating the DA, I was recovering from a long day. I changed all 4 wheels twice yesterday trying different combos, but ended up back to the 27" tall DRs. I tried a 26" tall bias ply, but they were brand new, they'll take some breaking in to give them a fair shake.

 

[RBS550]

Good run man! Do you know what your current race weight is? Curious.

3,835 lbs. I had lighter back wheels & tires on earlier in the day, but the tires were new and I only got one clean pass at 11.28 with a 1.65 60', so I put the heavier rims and DRs back on to get the 11.23 with 1.58 60'. Sway bars front & rear are removed.

 

[BadGTR]

11.20s on all motor is badass!I am sure its posted somewhere in the long thread, but what were the gains picked up? And do you think the better air is a also a factor on the gains?

 

[RBS550]

11.20s on all motor is badass!I am sure its posted somewhere in the long thread, but what were the gains picked up? And do you think the better air is a also a factor on the gains?

My best the weekend before was 11.40 at the same track but DA was 800' above sea level.
If memory serves me correct, I got 11.90s without the converter, with the converter 11.70s, then CJ IM & E85 LUND Tune and that went 11.48 first time out, then some logs and tune adjustments and many trips to many tracks and we're at 11.23. I believe 11teens were possible yesterday with more passes.

 

[Sinister]

Wow, very nice! Very excited to put my stuff on.

 

[kallo07]

RB have you considered swapping CJ exhaust cams? The 2015 has similar specs, 13mm and 263 duration or 265 can't remember right now.

 

[RBS550]

RB have you considered swapping CJ exhaust cams? The 2015 has similar specs, 13mm and 263 duration or 265 can't remember right now.

Yes I do plan on doing cams this winter. I will check those out, thanks.

 

[juk15gt]

just want to comment that the dyno sheet that you first put up was impressive enough for me. it takes all driver error out of the picture and even tames the suspension mods too. hell of a good mod in my book and i am doing the same. thanks for the post it is much appreciated.

 

[kris5597]

OP, did you happen to measure intake inlet ports on the head diameter compared to manifold runner outlet port diameter?

 

[RBS550]

OP, did you happen to measure intake inlet ports on the head diameter compared to manifold runner outlet port diameter?

Good question, but I'm sorry to say I did not measure the two, to compare.

 

[1320']

Be very careful with older cams..the firing pattern changed for 15.

 

[mustang_guy]

A member disproved that a couple months back. He did it by finding the info in his owners manual. I dont know if amyome double checked to confirm his findings though

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