l78vetteman

I am sure that this has been covered before, but I could not find a specific answer in my trolling through previous posts.

So, how much real HP is gained (compared to stock) with shorty headers on a stock '92 LT1 with muffler eliminators? Does anyone have dyno data with this comparison? Are these headers any better than stock exhaust manifolds?

I am guessing that long tube headers are the best way to gain HP, but I would like to leave the cats on if possible.

Thanks for your thoughts,
Rob

HeeHaw89

From what I've learned over the years on the forum, shorties do nothing for a stock LT1. Long tubes are the way to go. You could always have cats added to your system by someone who knows what they are doing.

19corvette91

vader86

Shortys are better than stock, say 5-7HP. Which is half what LT's give.

You can use LTs with cats, you just need bullit cats.

VR'92

From my personal experience I think shorties are a waste of money. I had them on my 92 and don't think I gained any HP at all. They looked cool though.

My opionon is the money can be better spent elsewhere. Do you have Roller Rockers on your car? Pretty good gain there for about the same money.

TM-Z06

Was this dyno or track verified? or butt-o-meter? The reason I ask is... on my old mustang I added shorty headers and didn't feel a thing. But I gained 6hp to the wheels on the dyno. Small hp gains are hardly felt, but with other small changes, they add up.

Bluewasp

I have a set of shorty headers for sale with Random tech high flow cats that will bolt up to stock exhaust. I just took them off my LT4 because I'm going to use longtubes with my 383 setup. E-mail if you would like pictures. bluewasp@yahoo.com...

l78vetteman

Thanks for all the commnets. Seems like LT is the way to go considering future addition of a cam will have more impact.
Rob

TA

1.5 hp

redbullapril23

haha
1.5
let me specify
1.5 fly wheel hp

yes def LTs!
LTs on a stock car will add about any where between 10-25 hp to the wheels
nathan plemons gained like over 30 hp i think because he had the lt4 hot cam kit and then added headers and gained that. so the thirstier your engine is for air the more of a gain you get with them!
good luck

your friend
Sean

bobmic93

I have the hooker ceramic coated shortys on mine. I didnt feel any real difference but it did give a little better throttle response. If you compare the manifold to the shortys youll notice the inside is much smoother and theres less of a radius in bends and there a lot lighter. Their is less restriction for exhaust flow , butt because its such a short distance before the exhaust smacks into your cats there really isnt a good hp gain. It looks great in the engine compartment. Cost 1000 installed.

redbullapril23

Bob r u in cali?
what persuaded u to go with shorties?
j/w not meaning ne thing.

your friend
Sean