New aluminum intake.


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By Unibodyguy - 17 Years Ago
Was kind of wondering why John Murrmunt decided to go with another design for intakes?? I saw the artical on the heads in Yblock Magazine and it also mentioned that and some other peices he's reproducing too. I would imagin he's still going to have the Blue Thunders( original design)  available too. 

                                               Michael

By Glen Henderson - 17 Years Ago
I asked John about this a few months back and he fills that his new intake will be an improvement over the Blue Thunder and even though he didn't come right out and say it, I think that he has had some supply problems from Blue Thunder from time to time.
By charliemccraney - 17 Years Ago
I spoke to him about it briefly as well. There are several things he does not like about the design of the Blue Thunder intake. I've heard the new intake will be more friendly with stock to mildly modified motors. But after reading about the heads in YBM, I would think that it should be a good compliment to the new heads which seem to be in the mildly modified to freaking fast category.

I think it's great. Look at the number of choices for intakes other engines have. Now we have 2 options for new intakes. And this second is designed by someone with a passion for the Y so it is likely not just an attempt to make a profit - which I greatly admire.
By pegleg - 17 Years Ago
I think that John's dyno results with the Blue Thunder show it works well in the case of big inch motors or on high RPM, high HP motors. The runners are quite a bit larger than A factory manifold, which lowers the velocity of the air/mixture. This helps at higher speed, but hurts low end power wjth smaller or milder engines as Charlie stated. I imagine Ted's experience is the same, ditto Wally K and Gary.

    The runners on the new intake will be somewhat smaller, between the OE and the Blue Thunder. This should be significantly better for the 292's and mild 312's on the street, maybe even at the the track. The runner shapes and entry angles will be improved over the other intakes, adding to the benefits. It was designed with the alloy heads in mind. A Mummert "Performer" package so to speak. Stealing a page from Edelbrock's book.w00t 

     There has been some "supply issues" with the Blue Thunders in the past.  

By Unibodyguy - 17 Years Ago
I had heard through probably 3 people all with different engine combo's that the Blue Thunder did work good, better than stock , but as Frank said pretty much on the upper RPM range of things. In fact one guy I know with a 55 Tbird said the he ended up putting the modified 57 intake because it had much better throttle responce than the Blue Thunder. Can't wait to see sdme Dyno tests with the new intake and see the numbers.

                                         Michael

By Doug T - 17 Years Ago
I am a very early adaptor of the Blue thunder and it was my impression that it was not a great improvement over the modified Cast Iron manifold I used in the dyno tests and first year or so after I got the car running.  It didn't hurt, but it wasn't a step function increase in power. My motor is a +.060  292 so it is a little on the small side and maybe not able to use all the flow that the BT can deliver.

But I like the look of the new manifold as shown in YBM. The plenum looks good from what you can see in the photo with a nice gentle transition into the runners. Eliminating the sharp turns and giving a consistantly decreasing cross sectional area are excellent design goals for manifold runners.  Getting rid of the heat under the carb makes it look a little odd but it can be thought of as an improved air gap.

By Ted - 17 Years Ago
Unibodyguy (11/14/2008)
Was kind of wondering why John Mummert decided to go with another design for intakes??

There have been issues in the Blue Thunder intake in both the cross-sectional areas of the runners and the variability in the lengths between the upper and lower runners.  The Blue Thunder intake on a stock Y engine has its shortcomings in the lower rpm band and John has addressed these issues with the new intake manifold design.