Also on the differences, Ted Eaton showed me something last week when I was at his shop. He had a Blue Thunder intake on a 312 that was waiting for a break-in and dyno run. The hold up was a distributor problem. (gear set too high on the shaft) At any rate, Ted showed me how because of the BT rear bolt boss on the passenger side, those TSP distributors have a little trouble with tuning. The distributor will fit into the block, no problem there. However, that rear bolt boss gets in the way of rotating that distributor due to the hold downs for HEI designed cap, etc. It's only like 30-40 degrees it will rotate back and forth on the 360. If you have a close firewall I would think you would have trouble with it. Ted says though that TSP models with the tachometer gear are not a problem since the cap sits higher. I should have taken more photos when I was there. Ted may chime in here at any time of course. 

Again, this problem is ONLY with the TSP brand of distributor. .

Daniel Jessup

Lancaster, California

aka "The Hot Rod Reverend"
check out the 1955 Ford Fairlane build at www.hotrodreverend.com

A key difference is that the Blue Thunder looks oem at a glance, if painted and retains the exhaust heat functionality that may be beneficial depending on your climate.  Other than that, performance is very similar, with Mummert having a slight edge in that area.  That said, Blue Thunder has made a lot of changes since the last dyno comparison was made.and has probably narrowed that slight gap.  When I say slight, I do mean slight.  If you had an engine built for it, you may not even notice it and if it is a typical build, you won't.  So get which ever has the feature you need or is cheapest.



Lawrenceville, GA

For a $300 premium that’s a plan.

miker
55 bird, 32 cabrio F code
Kent, WA
Tucson, AZ

Engine has an isky cam, I can't remember the exact specs, but it's the 301333. Red's headers. Gasket March porting on a set of G heads. 1.54 rockers. Bored .090 over. It's mild. Definitely a street engine. The blue thunder intake is almost $300 more expensive. Sounds like I'll just need to wait until mummerts becomes available.

I’ve got a couple Blue Thunder’s from before John’s manifold was introduced. The Mummert is a better manifold, but both require more engine work to see the potential. Both mine started out with a set of John’s ported heads (one set of 471’s, one set of 113’s), both low boost McCulloch superchargers and both bored and stroked. And headers. Starting over, I’d be using the Mummert manifold, but I’m not sure I’d see much difference in a street engine with closed exhaust.

What’s the plan for the rest of the engine? What’s the price difference?

miker
55 bird, 32 cabrio F code
Kent, WA
Tucson, AZ

Good morning everyone. I was hoping to get a bit more information on the two aftermarket 4 barrel intakes I see available for the Y. I called Mr. Mummert at the beginning of the week and unfortunately, he's a few weeks out on intakes. I've seen the blue thunder available on ebay, but it's considerably more expensive than the mummert. Is this price difference justified? Thanks in advance.