Cam and Fuel Injectors

[89 MJ]

Before I swap the new engine into my 89, I am considering putting in a set of different fuel injectors, porting the cylinder head/intake, and installing a cam.

 

What 4+ hole fuel injectors should I look at for a Renix MJ?

What performance cam should I look at for my Renix MJ?

[eaglescout526]

I think there’s some MoPar performance cams still left if you want to go that route. 

[89 MJ]

6 minutes ago, eaglescout526 said:

I think there’s some MoPar performance cams still left if you want to go that route. 

I might be interested in going that route. What are do the prices look like on them? Also, what is the part number on it?

[eaglescout526]

I’d have to pull out my 90 performance catalog and find the part numbers and check those prices. They weren’t terribly expensive. Actually they were a bit affordable. 

[89 MJ]

Just now, eaglescout526 said:

I’d have to pull out my 90 performance catalog and find the part numbers and check those prices. They weren’t terribly expensive. Actually they were a bit affordable. 

That's what I like to hear. Please look that up for me, no rush though.

[eaglescout526]

P4529229AD is available one left for $264 list. Wow I’ll have to look at my 90 catalog and see if part numbers are different. 

[ghetdjc320]

We have an ongoing discussion about some cams in this thread: 

Checkout Summit for the Mopar cams. They had the best pricing by far iirc. 

 

Edit: never mind, they are out of stock. You could easily have another manufacturer grind that same spec though. The only nice thing I liked about the Mopar cam was the lobe width which was about the same as stock. I believe Crane and lunati also have similar width. Most other manufacturers will have narrower cam lobes but they still work just fine as long as they are broken in properly. 

[89 MJ]

43 minutes ago, ghetdjc320 said:

Edit: never mind, they are out of stock. You could easily have another manufacturer grind that same spec though. The only nice thing I liked about the Mopar cam was the lobe width which was about the same as stock. I believe Crane and lunati also have similar width. Most other manufacturers will have narrower cam lobes but they still work just fine as long as they are broken in properly. 

Did the Mopar ones add much more power (noticeable)?

I have been following the other thread. 

[WahooSteeler]

8 hours ago, eaglescout526 said:

P4529229AD is available one left for $264 list. Wow I’ll have to look at my 90 catalog and see if part numbers are different. 

 

Looks like P4529229AC is the "current" number according to Summit and some Mopar parts sites. 

[ghetdjc320]

40 minutes ago, 89 MJ said:

Did the Mopar ones add much more power (noticeable)?

I have been following the other thread. 

I ran the 2229 cam and the profile was nice. Vacuum was good and idle was smooth. Ran it on a 4.2 “mini stroker” (232 crank in 4.0 block). The torque curve was a bit higher than the stock HO cam but it really didn’t give me what I was looking for. I replaced it with the comp 235 cam and it was much better off the line and and midrange. I was running stand alone ecu as well though with ported intake and Gibson header. It may do better in a stock configuration. Would also have been nice to degree that cam a bit to dial it in. 

[89 MJ]

Just now, ghetdjc320 said:

I ran the 2229 cam and the profile was nice. Vacuum was good and idle was smooth. Ran it on a 4.2 “mini stroker” (232 crank in 4.0 block). The torque curve was a bit higher than the stock HO cam but it really didn’t give me what I was looking for. I replaced it with the comp 235 cam and it was much better off the line and and midrange. I was running stand alone ecu as well though with ported intake and Gibson header. It may do better in a stock configuration. Would also have been nice to degree that cam a bit to dial it in. 

Gotcha. Thanks!