wicked383lt1

How much rwhp will I gain from a cut out and also what cam should install that will give me power yet me good for a FI setup?

20TA02

iTrader: (5)

email or PM Bob at Brute Speed. hes a helpful guy.

Sales4@Texas-Speed

iTrader: (4)

I have seen cut outs pick up anywhere between 5-30rwhp depending on what modifications you have done to a car. A car that is making a lot of power will definitely pick up a lot from a cut out if you bypass the muffler, a stock car probably won't pick up all that much.

I would recommend you consider our 228R cam on a 114LSA for a decent N/A and FI cam. It will provide a broad power band an noticeable pick up on motor, while not having a ton of overlap so it will work well with boost. Feel free to send me a PM for call us if you have more questions!

Tommyv8

iTrader: (8)

My car has headers, an ORY and a cutout in the stock catback. When I open the cutout it drops .12 off of my 1/4 mile time as opposed to running the exhaust through the stock muffler. Hope this helps.

craig178

iTrader: (2)

something is worng then if u drop time when opening cutout. never heard of that.

craig178

iTrader: (2)

QTP is a good cutout to get. i have one and i love it. just make sure it fits ur current exaust.

wicked383lt1

I don't understand why you wouldn't drop time in the 1/4 if you gain. Is the gain that small from the cut-out. Also I meant the current mods would that be a good mod to invest in? What size is the stock cat-back?

lemons12

iTrader: (71)

Some cars gain as little as 1-2rwhp... some gain north of 15rwhp.

Eps blower cam.

wicked383lt1

What size of cut-out and where should I install it on the exhaust?

Mac 2002 SS

iTrader: (6)

.12 et drop is not bad at all. I guess I will be giving QTP a call next week for sure .

lemons12

iTrader: (71)

3" and right behind the passenger seat, where the persons feet would be that is sitting in the rear.

Orr89rocz

iTrader: (13)

The proper way to do a cutout is to have one per header and run it at the total collector length that is in "tune" with your engines operating range. There are programs to calculate this length for best HP production on the cutout. Depending on where you make peak power, and the rpm range you operate in during a 1/4 mile run, optimal length will yeild best results. For example, my last sbc 383 was peaking in the 6250 rpm range but held flat to 6500. Based on the motors specs and cam, optimal length was said to be around 18" in total collector length. I had headers with about 6" collectors, so a cutout would be best placed at 12" from header flange.

There are lengths that will hurt power and there are lengths that will make for optimal torque.

fccs

iTrader: (26)

He has stock catback, same as me. I drop more then that. Cutout open It's basically almost a 30rwhp gain for me. Because... closed it's going through stock catback and quiet.

Tommyv8

iTrader: (8)

Exactly.