Well here is my opinion on the 248/232 +2.5. When I first got my car, it had the sohc motor in it, so swapped out for a 93 dohc. Well I guess i got lucky and got a 93 block with a 95 head. the head had 232/232 cams in it and it ran just fine. Then i heard of the 248/232 swap and i have to say that i was kinda impressed. From 1000-2500 rpm it kinda lagged, but from 3k to 6k it really kicked. Then I did some more research and found out that there is an even better cam swap 240/248. And I was like thats the stock setup for the s13 cams. Well to the junkyard i went and pulled some cams. And I have to say that thsi feels way different. It is much quicker to respond and the power band is from 1500 rpm to 6500 rpm. Instead of lagging then a hard pull, it just pulls right away and it feels gooood! So just some personal experience from me, that dosen't mean not to do it, I just think that there is a better swap for the money that you are going to spend.
Bigvinnie wrote:
My cams are in the stock position.
240/248 it much better tha the 248/232.
I don't know why people even consider using the 232 for the exhaust. It's a horrible cam to use on the exhaust. It reduces scavaging and exhaust pulse. It also limits the KA's rev range. You won't see a KA peak higher than 5800RPM with that cam on the exhaust.
FYI, the higher the lift and duration cam on exhaust the more effecient the engine becomes in making longer rev range and higher peak HP.
PDMs cams are an example of showing an extended rev range with a slightly higher lift and duration cam on EX, when compared to the INT.
And just another thing to help, I have a friend with a dodge v8 (non-hemi) truck. With the 232/232 cams he would start to pull on me by 4th gear, with the 248/232 +2.5 I could bearly keep up with him, but with the 240/248 I was pulling him hard by the end of 3rd and blew him away in 4th. Like I said you don't have to go by what I'm saying, I'm just giving you my 2 cents!!
Modified by sticky_steve at 4:53 PM 1/21/2009