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BadAssPerformance
11-09-2010, 02:28 PM
Other than port shape, is there a difference in bolt pattern or anything else between the early 2.4L N/A and later 2.4L Turbo head on the intake side? I'd really hate to have to cut this up or make another one if I switch to a turbo head...

http://www.turbo-mopar.com/forums/attachment.php?attachmentid=23029&d=1276579731
contraption22
11-09-2010, 02:51 PM
Yes, the bolt pattern is very different. Some of the bolts will line up. Some wont. Late heads have a divorced thermostat housing. I suppose you could weld bosses to the later head to make it work possibly.
turbovanmanČ
11-09-2010, 04:27 PM
Yep. I did use an earlier intake on an SRT engine, just redrilled a few holes, and I seem to recall no mismatch as the intake port is larger than the intake port.
BadAssPerformance
11-09-2010, 08:55 PM
Hmmm... are the runners in the turbo intake larger?
turbovanmanČ
11-09-2010, 09:25 PM
Hmmm... are the runners in the turbo intake larger?

Well I used the stock 2.0L intake that came with his 95 Neon, just redrilled it for the SRT engine. The ports in the head seemed larger IIRC, as I did have worry's it could be a bad mismatch. It was 5 years ago so a bit fuzzy on that part.
BadAssPerformance
11-09-2010, 09:39 PM
Gotcha, thats what i thought you said...

I am just wondering if there is any benefit to going to the turbo 2.4L manifold as the NA 2.4L manifold is not thick enough to really port.
Mopar318
11-09-2010, 09:51 PM
Gotcha, thats what i thought you said...

I am just wondering if there is any benefit to going to the turbo 2.4L manifold as the NA 2.4L manifold is not thick enough to really port.

Yeah, the 2.4 turbo manifold is VERY nicely built. I dont see any reason to even use anything different on a SRT4. The looks to flow nicley, and the plenum is fairly large.

I have a N/A 2.0 intake cut close to the flange if you wanna see a picture.
glhs0426
11-09-2010, 11:06 PM
If you are swapping to the later cylinder head, it's time for you to make a flange and runners to go with the killer plenum.

Not on topic, but how does your header line up with the rectangular exhaust ports?
BadAssPerformance
11-09-2010, 11:18 PM
OK, sounds like I need to upgrade the runners :) Hmm.. might be easier to start from scratch, anyone want a really fancy intake for their Stratus? LOL!

Actually I havce an OBX SRT4 header on it now and it matches up to the oval ports OK...
Mopar318
11-09-2010, 11:28 PM
Check out the inside of the SRT4 manifold. Probally one of the best I have seen as far as factory stuff goes.
BadAssPerformance
11-09-2010, 11:29 PM
I'll take a look inside when I get one on my band saw :D
Mopar318
11-09-2010, 11:35 PM
I'll take a look inside when I get one on my band saw :D

Sorry, added pictures, they didnt show up before.
glhs0426
11-09-2010, 11:45 PM
If you are just going to use the flange area, consider a PT Turbo lower intake. It took years for the SRT4 guys to have an intake made that made more power/torque of any consequence. The SRT4 intake is a REALLY good piece.

Cut the plenum off the SRT4 intake and flip it over to point the throttle body to the right side.
BadAssPerformance
11-10-2010, 12:56 AM
I'm going to make something similar to what I know works :)

http://www.turbo-mopar.com/forums/showthread.php?t=50155

How is the PT manifold different? Pics?
spoolinhard
11-10-2010, 02:01 PM
I have successfully bolted an indy onto an srt head. All I had to do was redrill the bolt holes. All the ports match up and the bolts are actually in a better location than when they where on the stratus head.
glhs0426
11-30-2010, 11:44 PM
How is the PT manifold different? Pics?

Finally got one in the shop. It was a 2008 with both the upper and lower intakes being plastic, but you get the idea. The aluminum intakes weigh a bunch.

Notice how the runners on the lower intake taper. Were the engineers speeding up the air to make up for the losses of turning the air 180 degrees from start to finish? I was under the impression that tapering the runners made little effect on how an intake performs. If so, why did they do it?

I left the port measurements at work, edit to come later.

http://i202.photobucket.com/albums/aa201/johnboy426/PTintake3.jpg
http://i202.photobucket.com/albums/aa201/johnboy426/PTintake2.jpg
http://i202.photobucket.com/albums/aa201/johnboy426/PTintake1.jpg
http://i202.photobucket.com/albums/aa201/johnboy426/PTintake4.jpg
http://i202.photobucket.com/albums/aa201/johnboy426/PTintake5.jpg