2.4L Engine Build - Chevy HHR Network


2.4L Performance Tech 16 valve 172 hp EcoTec with 162 lb-ft of torque

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Old 01-01-2012, 11:24 PM   #1
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2.4L Engine Build

Hey guys. The 2.4l build is underway and I just wanted to share a little bit about where I am at. I will keep updating the thread as I continue. So far I have picked the motor and pulled the head off. Within the next few days I hope to have the head ported and the valves lapped, then moving on to the internals.

On top of the current M62 setup, I am installing:

JE 9.0 Forged Pistons
ZZP Forged Rods
ZZP 2.4l(F23) Stage 2 Clutch
80# Injectors
2.7" pulley
and a few other things...

Quick FYI, I dynoed 257whp with a 3.1" pulley a while back. My goal after the build is to approach 350whp with the m62 on e85 and a solid 300+whp on 93.

After about 8 hours this is where I am at:















Updated
















Last edited by hhrfreek; 01-05-2012 at 09:22 PM. Reason: Updated pictures
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Old 01-01-2012, 11:27 PM   #2
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She'll either make power like mad, or you'll have a grenade with the pin pulled out on your hands, keep us posted on the buildup. We await the dyno printouts with baited breath.
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Old 01-02-2012, 12:03 AM   #3
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hhrfreek- Cool man..

So you lowered the C/R for the blower... I'm following along..

I use JE pistons in my flathead stroker .. Good stuff.
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Old 01-02-2012, 12:11 AM   #4
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very interesting experiment.
You may need to upgrade transmission and cooling system, as well as brakes.
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Old 01-02-2012, 07:44 AM   #5
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She'll either make power like mad, or you'll have a grenade with the pin pulled out on your hands, keep us posted on the buildup. We await the dyno printouts with baited breath.
LOL. Thats how I feel now. I will be more comfortable when the build is over knowing the pistons and rods are good to at least 900whp.

Quote:
So you lowered the C/R for the blower... I'm following along..
Yessir I wanted to do 9.5 since my boost is going to be around 15, but ZZP has 9.0/10.4 JE Pistons readily available. I am taking a hit with hp on the low compression, but hopefully I can get most of that back by leaning it out and throwing some timing at them. The rods are .01" longer though, so that will make my compression slightly more than 9.

Quote:
very interesting experiment.
You may need to upgrade transmission and cooling system, as well as brakes.
The manual transmission is pretty stout. If something breaks I will just get another used one. The F23 is known to hold up on builds of over 400whp. Our cooling system is also very efficient already. Temperature fluctuates like it did N/A. The brakes...I wish I had disc all the way around, but in the spring I will be picking up some better rotors and pads...mine are original and they are corroding as they are going on 6 years old. After a few hard stops I start to get a shimmy guessing because they can't cool quickly anymore.
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Old 01-02-2012, 10:04 AM   #6
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sounds interesting I have been running the roots style blowers for a while on my drag street car
With the whp you posted I think you would be around a 13.60 with the old build and low 12's with the new build on e85
Of course that's with good traction etc
Have you ever considered seeing what it runs either 1/8 the mile or 1/4 mile
Also how much did you have invested in putting the blower on originally .
Sounds like a great sleeper
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Old 01-02-2012, 12:15 PM   #7
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I did go to the track with it a while back probably~230ish whp and did 15.1 @ 95. I hope to be around 13 flat as that is what many of the quicker SS models are running. I originally spent around $2300 for the kit.
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Old 01-04-2012, 10:53 PM   #8
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Updated the original post with more pictures.

Progress update: I am hoping to have the exhaust side of the head port finished tomorrow as well as the cylinder honed/deglazed and the new rods and pistons installed.

Picking up new rod bearings tomorrow and also ordering a set of valve seals.

Check out the difference in a forged 900whp tested rod(ZZP) vs the stock rods which gm suggests replacing at 250whp. The JE pistons are supposed to be good to 1000whp...so I am good there too lol. The beefy parts are also a 100g lighter per cylinder than the stockers and good for a lot more. The JE ringlands are 1.7 mm thicker than the stock pistons as well.
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Old 01-05-2012, 12:09 AM   #9
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Some stout goodies, for sure..

Using the stock crank ?
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Old 01-05-2012, 04:40 AM   #10
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Originally Posted by sleeper View Post
Some stout goodies, for sure..

Using the stock crank ?
Good question about the crank?

Also i am assuming and hoping you are planning on having the rotating assembly balanced?
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