cmi etop light vs big sport tubes
 

Just finished my 540 ci nat asper motors, i own etop light headers(less than 6 months old) which are on the motors now and in the boat, I'm wondering if I'm losing hp and how much hp buy using these headers, the motors fit the parameters of cmi's big sport tubes, wondering if i should spend the money.

Re: cmi etop light vs big sport tubes
 

What is the HP of the new engines?

The CMI Catalog recommends Big Tubes when you are over 750 HP. I'm sure if you are close they will not robbing too much HP.

If we can be of any assistance, please let us know.

Kirk
Ateco Engine and Dyno Shop

Re: cmi etop light vs big sport tubes
 

You are probably losing hundreds od horse power,you should sell me the e-tops really really cheap and buy the big tubes for yourself. :D :D :D
Nordic95

Re: cmi etop light vs big sport tubes
 

I had the same questions when I was doing my 540s this year. I kept my e-tops - too much $ difference with questionable increases?

Re: cmi etop light vs big sport tubes
 

I think you guys should be fine with the Sport Tubes or Etops. Unless you think you are running well over the 750 HP you probably aren't losing much due to the headers.

Nordic - you are a funny guy!!!

Re: cmi etop light vs big sport tubes
 

I tried. :drink:

Re: cmi etop light vs big sport tubes
 

well it seems like there is not much difference, dyno numbers are 656hp at 5350, but big tube headers were used on the dyno not mine.

nortic as for selling you them really really cheap not a chance yet, you never know, depends with my next endevor is.

a 36 deep impact is high on my list right now, w/ trip 300's

Re: cmi etop light vs big sport tubes
 

At 656 HP you are fine with what you have. Sure we'd like to move some Big Tubes, but you don't need them.

Re: cmi etop light vs big sport tubes
 

thanks for your imput, not having to spend more thousands sounds great.