I agree Chuck if the motor holds together longer due to less detonation in the rear
housing Ill be happy. Ralph

 

I have barely drivin the car since it was tuned, but it does feel very smooth, and it seems to build boost sooner even though I am running a 67mm comp wheel instead of a 61. Thanks forall the phone help Ralph. I will post my dyno for you to see when I get it e-mailed to me.

Ryan from Indianapolis

 

Am I missing something here? How can equal length runners in the lower intake increase horsepower or torque? In my limited understanding - the same amount of air is still coming in through the TB. I would think the only advantage would be consistant AFR across both rotors and EGT.

Chris

 

Again this is something you can't tell unless you had an EGT in each runner prior to the manifold and test it again after the manifold.

 

What good is before the manifold? I hope you don't have EGT's before the manifold.

I hope you ment egt probs in both runners of the exhaust manifold with the Stock LIM and the same egt probs still in the with the new equal length LIM.

 

I mean prior to switching the LIM. EGT's go in the exhaust manifold at least last time I checked.

 

I have dual EGT guages and the new mani has them dead even, although I put then in at the same time as the manifold.

 

Have you guys ever noticed that most of us never make only one change at a time. I changed manifolds and went from a t72 TO t70gts turbo so I dont know the before and after either. I got the weather station fixed today and CJ is bringing his car back saturday. I am going try and match boost and afr per
before and after graphs and Ill also give the correction factors with barometric
pressure, temp, and humidity. We are going to have another test here in a week on the GT42r setup and can compare it also. Now that there are some LIMs out there we can also get others to see there results. We are not big manufacturers like edelbrock, we designed these to fix a problem we had with our motors,
example LIM to fix lean rear rotor and our oil ringed pan for LEAKS!! All the rest
of the benifits of these products is just iceing on the cake to us.
Thank you everybody for all the input and help, this is why I love the RX7 community!! Ralph Friend

 

I have a rule about my car. If the engine is out, it's not going back in till its faster

 

My rule is probably: "Do it right, do it once."

 

Please correct me if I am wrong. It all deals with the lenth of the runners and it's reverberations. The shorter the runners more topend, the longer the runners more torque. It also deals with volume, I do beleive this manifold has much more volume. That also simulates longer runners.

Ty

 

this is why I wanted ralph to tune my car, great guy. Here is an odd question but can anyone lay the stock lim down and lay the gz manifold down and show me the difference in thickness. The fact that the runner moves 1" further doesnt affect me, but the thickness does.

 

Here are a couple of pics for comparrison. They are just about the same in thickness.
The bolt boss in front is going to be redesigned for a lower fitment.
Sorry I cant get the pics to load.