how much rwhp can a magnaflow catback handle without being very restrictive?
06-07-2008, 08:21 PM
#1
how much rwhp can a magnaflow catback handle without being very restrictive? yes i already know everyones going to say just get a cutout too, i probably will. but...ive heard people say almost any catback will be somewhat restrictive after ___ horsepower. i think ill be switching to a magnaflow catback when i do headers because, well, i have flowmaster right now. the car will have all the easy little bolt ons and heads/cam/intake, stock internals. will the catback be fine or will i need a cutout...
06-08-2008, 09:40 AM
#11
Way I see it he has a point. Some guys hit 400wrhp and all of a sudden folks think that is the lowend of what is possible. Not a lot of heads/cam car that far over 400rwhp speed-demon24 and his AI setup are at 429 and someone with I think it was Lingenfelters and E85 was a little higher than that on a goofy dyn o we can't really compar to much but beyond that few cars of that mod level reach beyond say 410.
The guys hitting thoe numbers over 400 are not doing it on their first attempt at heavy modding either.
Restriction has to do with more than HP output too, cam specs play into exhaust as well this is a piece of why one car gains a huge amount putting a cutout in a catback and another with the same exhaust gains little at a similar HP level.
Last edited by 96capricemgr; 06-08-2008 at 09:48 AM.
06-08-2008, 03:13 PM
#14
and yea i know it will take alot to get 400rwhp, but im not going to be throwing any half *** stuff on here, the cam for sure will be a custom grind. and 400+ is a goal more than anything, not saying i can garentee that but ill be going for around 400, and is it possible to get over 400? yes, and it might just happen, we'll have to wait and see.
06-08-2008, 05:40 PM
#16
the cam will be a be a lingenfelter custom grind...i highly doubt it will be half assed in any way shape or form 
besides that were way off topic, so i shouldnt have any problem with just a magnaflow catback with the power ill be making?
besides that were way off topic, so i shouldnt have any problem with just a magnaflow catback with the power ill be making?
Last edited by lt1noob; 06-08-2008 at 05:45 PM.
06-08-2008, 07:02 PM
#18
No you wont have any problems, there may be a couple ponies that you would see if you went with true duals but I dont know or think the difference would that significant at that level. You sure that LPE does custom grinds? I have never heard that before. Hitting or getting over 400rwhp in a stock internal stalled automatic isn't real typical and isn't easy unless were talking a real nice set of heads say some fully worked trickflows etc., pretty decent sized cam, and proper installation. I would set your goals on ET's instead of hp numbers, if you were a 6-speed that number would be alot easier to attain but that doesnt mean its faster because it dynoed more you know, thats why I think ET goals are a little better just my .02.
Last edited by StealthFormula; 06-08-2008 at 07:08 PM.
06-08-2008, 08:28 PM
#19
No you wont have any problems, there may be a couple ponies that you would see if you went with true duals but I dont know or think the difference would that significant at that level. You sure that LPE does custom grinds? I have never heard that before. Hitting or getting over 400rwhp in a stock internal stalled automatic isn't real typical and isn't easy unless were talking a real nice set of heads say some fully worked trickflows etc., pretty decent sized cam, and proper installation. I would set your goals on ET's instead of hp numbers, if you were a 6-speed that number would be alot easier to attain but that doesnt mean its faster because it dynoed more you know, thats why I think ET goals are a little better just my .02.
