Intake manifold mods

[h018871]

Originally Posted by 1989GTA

Ok, I went ahead and sent off an inquirey to Gwatney Performance about the pricing of this modification. Also about buying another LS3 intake manifold from them to perform the modifications on. They may already do so but I added a request to open up the throttle body port to 95mm or maybe 96mm incase down the road I might want to tryout the BBK 95mm throttle body. I believe the stock size is 94mm. Trying to get as close to 500rwhp as I can using 91 octane gasoline. Might be a bridge to far using 91 octane.

Edit: In my other post there was a reply that he actually gained some MPG with this modification. I found that interesting.

i pulled the trigger and went a similiar route as you. got a LS3 IM and had him perform his magic and send to me. i got a UDP to put on the car too! i'll be doing some science around the middle of Apr..........baseline, add UDP, add crawford style IM. it should be interesting to see how it works out on my car.

[Camarojt]

Originally Posted by 1989GTA

Ok, I went ahead and sent off an inquirey to Gwatney Performance about the pricing of this modification. Also about buying another LS3 intake manifold from them to perform the modifications on. They may already do so but I added a request to open up the throttle body port to 95mm or maybe 96mm incase down the road I might want to tryout the BBK 95mm throttle body. I believe the stock size is 94mm. Trying to get as close to 500rwhp as I can using 91 octane gasoline. Might be a bridge to far using 91 octane.

Edit: In my other post there was a reply that he actually gained some MPG with this modification. I found that interesting.

If you are referring to my post I gained MPH not MPG. I don't remember where that post was but the G and H are right next to each other so I could have just hit the wrong key??
Hope this clarifies.

[Kyle2k]

Just curious if this knowledge could be applied to the fast intake and see how it performs?

[Smoky]

A DIY would be priceless... or are we talking a machined process that is beyond DIY?

[Rhino79]

Originally Posted by Kyle2k

Just curious if this knowledge could be applied to the fast intake and see how it performs?

No the fast manifolds have the "Bell" a the ends of the runners in the plenum. Basically what we are trying to mimic with this mod.

[Rhino79]

Here is the fast runner

[Kyle2k]

Originally Posted by Rhino79

No the fast manifolds have the "Bell" a the ends of the runners in the plenum. Basically what we are trying to mimic with this mod.

Awesome, thanks for the insight Ryan! How about the LS7 manifold?

[gelboy1015]

Email sent!

[Sapper12b]

Im going to resurrect an old thread. Oh well .......

So a lot of people seemed interested in doing this modification and appeared to be committed in doing so. Are there any updates or any kind of feed back after prolonged use ?

[Pro Stock John]

My weiner is definitely 3mm longer.

I have 7-8K miles on my intake, all is good.

[Sapper12b]

Originally Posted by Pro Stock John

My weiner is definitely 3mm longer.

Im going to take that as a personal update......

Glad to hear that you havent had any problems with the Intake Manifold. Any noticeable difference in the performance of the vehicle and did you have your ride re-tuned after the install of the Intake Manifold?

[Sapper12b]

Anyone else driving around with the modified intake?

[BFASTNOTLAST]

Originally Posted by Sapper12b

Anyone else driving around with the modified intake?

8500 miles here. All good.

[Sapper12b]

I'm glad people are going strong with this mod, but if you had to re-do it. Would you go with the FAST intake or stay with what you gave? Hind sight , just trying to get the most out of it.