1994lt1ta

so ive seen plenty of LS1s put longtubes, catless y and a catback on and gain 30-40rwhp after a tune...well my LT1 has K&N CAI, longtubes, catless Y, and a magnaflow, no tune...does anyone have an idea how well LT1s with the similar mods respond to a tune? is it gonna be noticeable? thanks guys

BlackBird87

iTrader: (6)

You will benefit from the tune how much hp tho is hard to say

1994lt1ta

yea im not lookin for a precise number, just curious if they respond the same as an LS1 powerwise, or close to it, because if a tune can shave a couple tenths off my ET ill be happy

Bowtie Boy

LS1s really benefit from tunes, I believe the rwhp gain is more from tunes then headers on an LS1. LS1s could gain upwards of 15-20 rwhp through the average full exhaust being that their stock manifolds are very similar to shorty header performance. While an LT1 could gain upwards of 25 rwhp from headers alone. This comes through experiences ive seen, heard and read on both platforms LTx and LSx.

gregrob

iTrader: (8)

If you have already done those mods, you absolutely NEED a tune to optimize the results. 30+ hp is completely reasonable by these same mods on an LT1, with the proper tune.

If you used a catless Y the car will be PIG rich and NEEDS to be tuned.

joelster

Yes it will be noticeable. I'd say somewhere in the 15hp range, plus the car will be much crisper and smoother.

MasterTomos

iTrader: (15)

Most mailorder tune places claim around 13-17hp @ the wheels

1994lt1ta

lol yea i do run real rich...one of my buddies LS1s gained 20rwhp before even tuning it...so hopefully after a tune im in that ball park...i appreciate the info guys, next time i have a stupid question feel free to hop on the topic haha