Hopefully maven or some others will jump in on this.

there almost seems to be a preference for the 06-07 2.4 intake manifold for the 2.2 guys. From what i can tell the 06-07 is slightly larger. But at the same time from what i can make out stock for stock the 08s seem to be stronger performers. Now I could be wrong. And if I am I will be corrected.

I was just thinking if the 06-07 is better that it might slightly help out us 08 guys. But if thats case why do the 08's seem to put down slightly better hp numbers? Again could be wrong but from browsing on here and youtube it just seems the 08s are stronger. Everyone tells me im a 16 flat car per the internet. But with the 2 mods I have Im taking out cars that have flat out run 15.5's. And on the same night they ran the 15.5 at that. (numerous times) I dont think the 2 mods I have would make me drop half a second or more. But feel free to chime in as im curious about all of this.

 

Ive got a 2008 2.2 LS, i have the 1st design(06/07) 2.4L intake manifold. My best run on stock 195/15 Contis was a 15.3 (2.4 manifold and GMPP SRI)

If your question is will the LE5 manifold help an 08 2.2, the answer is yes.

 

Hey Maven I thought the 08-10 LAP motor used the same manifold as the 08 LE5.

 

No was asking about the difference between the 2 different 2.4 intake manifolds. the o6 07 is larger i believe than the 08. so would the 06 07 be an upgrade or downgrade for an 08 2.4 guy?

 

It does.

I too believe its larger, ive enver verified it though. If it is larger I would say its an upgrade, worth $150? thats a different story.

 

I have looked at the 08 Manifold versus my 06 Manifold. Dunkinuts, before his cobalt was totalled, had the 2008 2.4 and the difference in the manifold was noticeable. It looks a bit more restrictive just by looking at it. We just need solid proof in this thread..

 

the 08 looked more restrictive? Im just curious if this could be an upgrade for the 08 guys. The only thing that baffles me though is that the 08s seem to run stronger than the 06-07's and the only major difference is the intake manifold.

 

I wouldn't be surprised if I was wrong. I'm just going by what my naked eye saw. The design appeared a bit different than mine which I assumed looked smaller. Can anyone post a picture of the two manifolds? I'm getting curious now

The 06 manifold appears to be more of a solid piece whereas the 08 seems to be multiple pieces. Perhaps I'm just confusing myself..

 

We need measurements people

 

Agreed

 

yea it does confuse me as to why the 08's run better times in the 1/4 mile compared to the 06-07 2.4's

 

Ive never got a good run in with a 2.4 SS manual. But I got a brief run with one and started slowly pulled. Was a bit shocked.

But to my knowledge the only real difference is the intake manifold and if anything the 08 from the pics ive seen looks a bit smaller. However... If the runners in the 08 are actually shorter while the runner internal diameter is the same this might explain it.

 

the 08 2.4L sport models came with slightly more torque then the 06/07 models. 167 lb-ft to be exact vs. 163 lb-ft for the 06/07 models. i don't know if that is enough to make a real difference though ....

 

I dont think that makes up for the bigger part of the difference. All I can really think of is the newer manifold has shorter runners which promotes high rpm power production.

Usually the rule is longer runner intake manifold = more lowend grunt
Shorter runner intake manifold = more top end pull

 

i know i was just stating the 08's made a bit more torque

 

I have a 08 sport 2.4 and I can't find a cold air intake for my car! somebody know what I can do or where I can find it?

 

Use one for a SS/NA......

 

What he said. I have an injen on mine. It rubbed a bit on the hood blanket but trimming down the silicone coupler fixed that.

 

I had thought about that before but I had my doubts cause I knew the intake was different, but thank you for clarifying that for me I appreciate it.

 

i heard different that it dont really help with the 2.4 mani and tb. but i have all the stuff to do it, but i want to mae sure it will help me.

 

Check the 2.4L modification list all of the intakes on that list fit the 2.4L

 

with intake manifolds there are 2 things, port size and length, size determines flow velocity at an rpm and length determines a resincnce rpm for the intake, if you look at the mazda 787b race car which had a veriable length intake manifold it used natural air resinence as a form of natural supercharging to the tune of about 110 perecent efficency accross its power band, so it depending on the size and length of the ports on the 05-07 ss/na intake it may be tuned for a different power rpm and cause a loss in power for the close to stock 08's. from what ive read the lightley modded 08's are faster then equivelent 05-07 ss/na's, so why bother?

 

Why bother? To know. What better reason is there? To experiment to learn. To possibly present a new mod one way or another. This will honestly only go 1 of 2 ways.

1. the 08 manifold being the better manifold to use for a swap over the favored earlier manifold.
2. the earlier manifold being an upgrade for the 08s.

It also brings into question if the 2.4 manifold upgrade all the L61 guys do would possibly hurt the LAP motors. Since they apparently use the 08 LE5 manifold. (which also means theres now another source of 2.4 manifolds for L61 guys) So if the 08 2.4 manifold favors high rpm power over low or mid range like the earlier design might. then the 08 LE5 manifold might be the better choice for cammed L61 cars.

Also the Mazda race car isnt the only variable length manifold. Ford and Mazda have used designs like that as well as yamaha volvo and some others.

 

continiousley variable*