Another intake manifold question
03-02-2007, 10:06 AM
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Another intake manifold question I recently bought a '99 Corvette hardtop which has an LS1 that was modified by a well known tuner. It has headers, ported heads, Donaldson air box, dyno tune and a bigger cam of unknown specs. The dyno sheet that I got with the car shows 414 rwhp. and 380 ft. lbs. rw torque. The intake manifold has #18726543 which I believe is a stock Corvette LS1 intake. The question is how much power is being lost by not running an LS6 or FAST intake?
03-02-2007, 12:35 PM
#2
Actually, I think 18726543 is the firing order. But this car would have come with the LS1 intake.
I've read all sorts of stuff when it comes to manifolds. The increase would be significant going to the FAST 90 or even the LS6 from an LS1. I'd guess 10-30 rwhp.
I've read all sorts of stuff when it comes to manifolds. The increase would be significant going to the FAST 90 or even the LS6 from an LS1. I'd guess 10-30 rwhp.
03-02-2007, 01:18 PM
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Yeah thats the firing order. If it is an LS6 there will be a part number directly above the firing order numbers. If it is an LS1 the part number will be on the passenger side.
03-02-2007, 08:52 PM
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I feel really stupid, I looked again and it says firing order right under that number. It has 12561184 above that which is the actual part#. Thanks to everybody who responded for the info.
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03-02-2007, 10:39 PM
#8
Originally Posted by jabrun
I feel really stupid, I looked again and it says firing order right under that number. It has 12561184 above that which is the actual part#. Thanks to everybody who responded for the info.
