About a month ago the old kegger sprung another plenum leak. When I installed the engine I stripped it down to check it out and install a few mods. I went back with a Felpro plenum gasket and it held up for about 2 years. I was going to buy the Hugh’s plenum fix when I saw an EGR M1 intake for sale in the classified section of the forum and I’ve been kicking around the idea of getting one. I’ve had it in for about 2 weeks know.

The intake has been a really good mod. The engine pulls harder from about 3500 RPM up. I haven’t noticed any low end power loss. I used to have a problem with pre-ignition and that’s gone. I think I found the problem when I took apart the old intake, the EGR passage inside the manifold was plugged with buildup. I missed it when I cleaned the intake 2 years ago; and I cleaned the heck out of it. 12 cans of brake cleaner, a hot tank treatment and couple of rounds in the parts washer didn’t get it out. The problem was I didn’t even look to see if the passage was clear. It opens into the intake with 2 small holes and they were plugged. After a little bit of reading I found out the EGR system circulates exhaust gas into the intake and it has the effect of cooling the combustion chamber. Never knew that.

I think it’s a great mod and the guys at work have been pushing me to Dyno the truck. I’m doing it tomorrow morning and I’ll post up the results. I’m hoping for about 240 RWHP. It’s a 5.9L with the following mods:
M1, Mopar performance cam (it’s called the RT+10 and it’s a mild cam-480 lift), 52 mm throttle body, performance computer and high flow cat and muffler. No headers, just 93 exhaust manifolds with the stock Y pipe.

The guy at the dyno shop said there is 25-30% drive train loss with a 4X4. Stock the engine is rated at 245 HP at the crank which would be about 185 at the rear wheels. Any guesses?

 

i'm jealous.. how much that intake run you?

 

325.00

 

Sweet! I've been wanting a M1 but I was worried about the low end TQ since I tow. I defiantly want to see what your HP+TQ numbers are since I got just about the same setup.

5.9 53mm TB, MP Comp. 1.7 RR (Cheaters way of a cam) Kegger, Headers, .030 decked heads and block. Headers Gutted cat, FM 40, ect. 3.9 gears. Stock TC

2300 is a high TC. How does it launch?

Do you have any Videos or pics? I can't remember if you did post them already.

 

We do have about the same setup. You’ve got the headers though.
The stall converter may be why I didn’t notice any low end power loss with the cam or the M1, both of which they say can give you low end power loss. If I load the converter to about 1500 rpm and punch it, it will break the tires loose through all of first gear. The converter puts me right in the power curve off the start and gives me two long black lines that I don’t want. It’s a problem to get the tires to stick for a good start and I have a positrack rear end.
I don’t have any videos but did post a few pic’s in my garage back when I registered.

 

so you've got a kegger available then...?

 

Dyno done. It wasn't what I hoped for but it wasn't bad. I've attached the Dyno slip. I hope it works.

Attachment 10804

 

That is cool, Real numbers. Not to bad. 226.5HP 267.2TQ.

Stock is 245HP 350TQ for the 5.9 at the engine. That TQ is way down from what I was expecting.


I forgot what size tires you got?

 

The torque numbers are low if a stock 360 puts out 345 ft lbs. It’s almost like I picked up HP and no torque. It’s also a little interesting that the torque curve is almost flat from the start of the Dyno (3200) to where I had them shut it down (4700). It varied from 248 at the start to 252 at the end, with a high of 267.2. The one plus is that the engine pulls evenly right through the operating range, no upper end power loss to speak of.

I’m not sure if I believe it but the guys at the Dyno said they thought the numbers were good. I’d like to know what “good” is compared to. They also said about 25% drive train loss with an automatic and transfer case and posi rear end. If that’s the case crank HP would be about 300 and crank torque would be about 350. I’m not sure if I believe that drive train loss seems a little high.

End result is Mods increased HP by about 45, with no change in maximum torque. It would be nice to see what a stock 360 Dyno’s at in a 4X4.

 

Yeah, torque definitely sounds low.