C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

l98 headers

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Old Oct 13, 2015 | 02:59 AM
  #21  
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Originally Posted by zapc
trying to avoid all the negatives of headers, poor ground clearance,
blowing gaskets, extra underhood heat, poor spark plug access, burning of spark plug wires, cost is not the biggest issue, all those negatives for 20 hp?,
I have not had problems with ground clearence or gaskets. The access for the spark plugs with the OBX is a lot easier than on my '68 vette with aircon. The fitment of the header was rather good except for the mounting flange where the holes didnt line up with the heads and I had to dimple the tubes a few places to get space for the header bolts.

Originally Posted by zapc
the only header ive read that fits well was TPIS and this is not the forum to bash them, but all they did was lie to me repeatedly with my chip and miniram from them, and would love to avoid spending more money with them. unfortunately they make good products. Since the chip burning thing to stay with the miniram and or tuned port is so intensive i just want to maximize what i got, dont think ill be doing any more work beyond headers or y pipe or both. car is real strong already.

and thank you Ronaldo for all the pics of your headers, bottom line would you use them again?
Yes, I would.

About the chip burning thing. I bought the Ostrich 2 at the same time as I installed my 383. It's a great little device, you can tune realtime or you can work with a tuner by e-mail instead.
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Old Oct 13, 2015 | 06:23 AM
  #22  
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Originally Posted by zapc
custom chip, I datalogged for them, no one, and I mean no one local
will work on a c4 tune by me, I begged here and on third gen for someone to help me, id be a paying customer, no favors, no one would, basically they all said if they had to learn, so would I. datalogging by mail was very tedious, had to buy a second chip because of the down time of mail away, anyway like I said before ill be happy if I can get this car in the high 12's, may already be there. was looking into the ostrich if your familiar with it, you can do a tune thru a laptop. no more burning chips. sounds interesting.
Got mine dyno tuned at hi-tech motorsports in Elk River MN

Last edited by aklim; Oct 13, 2015 at 07:40 AM.
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Old Oct 13, 2015 | 11:58 PM
  #23  
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Originally Posted by aklim
Got mine dyno tuned at hi-tech motorsports in Elk River MN
thanks, a bit of a drive from long island NY LOL
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Old Oct 15, 2015 | 06:23 AM
  #24  
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Default 1 5/8 Headers

Guys ,You don't need big headers unless you intend to rev it hard,over 6500 rpm go to 1 3/4 ,and above 8000 17/8 seem to work best
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Old Oct 15, 2015 | 09:08 AM
  #25  
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Originally Posted by Apache 84
Guys ,You don't need big headers unless you intend to rev it hard,over 6500 rpm go to 1 3/4 ,and above 8000 17/8 seem to work best
Perhaps but smaller gives less to no room for expansion. At which time, you pay more to do it right.
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