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No, the Firehawk used the SLP shorty headers and Y pipe. The headers were stainless, 1-7/8 or 1-3/4, and I believe they were a "tri-y" design....they were a nice shorty header. Way better than the Edelbrock TES of the era (which is what I had). Steel, crimped collector, 1-1/2"primaries. No, the Firehawk had headers. Basically, the SLP catalog of the time, was all of the Firehawk parts.
Originally Posted by TorchLT4
And now the already astronomical used prices will climb higher.....
Gotcha. You should run back the test again now with a set of headers or LT1 manifolds to see if the +25 hp some people claim on a stock tpi is actually true.
I could. I have long tubes in the "museum". But then I'd have to swap back for other intake tests. But remind me of that later. I could...and would be happy to swap on the headers after the last intake test.
The next "intake" is in the mail....should be here Saturday. It's siamesed ASM runners and heavily hogged plenum. A "Poor man's Super Ram".
From the Intake's owner:
"We are on to round five I sent Tom siamesed runners and matching plenum to test a "poor mans" super ram, this was very popular where cast runners where ported with various different divider lengths many would go to great lengths to hog out there runners. This set is imo max effort with out welding, the runners are a pair of siamiesed AS&M runners that used to be sold through them. This set was chosen bc the AS&M runners are the best out of the box runner available even to this day with a near 41mm inner diameter runner with no protrusions to speak of as seen on cast runners, this is the same size as the SR runners only difference is the SR expand almost to 43mm at the entry. The plenum was port matched to the runneres almost perfectly and the throttle body entry was set up for mono blade to increase what ever plenum volume can be had with the small plenum.
To get this out of cast runners would be a undertaken bc its very hard to open them up to 41mm near the center and certain areas may need welding where they cast indents into them for the TB coolant line and clearance for the bolts
That looks pro! I had a set of AS&M and they are paper thin, it looks like the runners are welded together. Very good weld there. Mine with less porting and big mouth base knocked about a second off compared to the stock parts. I'm impressed by the clean plenum too. So many have baked on oil gunk.
Hi everyone. I should have posted an update yesterday. I was out of town over the weekend....long/holiday weekend here in UT, thanks to the Mormons! Anyway, got back late Monday night and the next test victim, the AS&M runners had arrived in good shape. I MAY go out of town this weekend, if not, I'll swap the upper parts and make an another appointment.
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Originally Posted by Tom400CFI
HSR is "on the list". I think it may be after the ASM runners.
For those who rarely/never look at 3rdGen (like myself), you won't know Tom posted results of the mega-ported siamesed runner setup (similar to what's on my 383). It's been over a week so I don't feel bad encouraging him to bring those posts over here. (Hint: the siamesed ASM runners were damn close!)
Also, he bought himself an HSR -- like I've sat on for 13yrs! OUCH!! Will be interesting to hear his observations on driving the HSR (whenever he installs it). Presumably, not until other intakes have been testing (from the proposed 10 -- comparing to 10xTT article), BTW...Have you (Tom) considered measuring a FFI (FIRST) as one of the 10 choices? Considering that it might be even better than a Superram, I strongly hope you include it!!!)
If this post doesn't tickle his reply/post, I'll come back in a few days and point everyone to that thread in Thirdgen.
STAY TUNED!!!! (Hint, one post every 3mos SHOULD be called for!! POST THOSe RESULTS....POST THOSE RESULTS....POST THOSE RESULTS....LOLOLOL
07-13-2023, 04:17 PM
