odurandina

thanks Spencer. looks great.

God bless.

Dougs951S

Do yourself a favor spencer and spend the money to get T-bolt clamps. Nothing sucks more than getting on it to enter onto the highway, only to blow a coupler off and have to fix it on the side of the interstate in the middle of the night, with no flashlight. Ask me how I know.

V2Rocket

I was looking at those yesterday. There is a variety available with springs under the nuts to maintain clamp tension as the hose expands...worth it you think? Or stick with regular ones?

Dougs951S

I just got the regular ones, I got 8 off fleabay for a good price, all stainless. Believe me if you torque those nuts down right, they are never coming off. You should look into meth injection too, you could make some big power here. I'm in love with this whole project, my car is my mission to make big hp without the big price tag. I've never believed in the whole, " fast, reliable, cheap, pick two" thing. I think that only applies to people who can't turn a wrench or fab a part but know how to open up their wallets. Ingenuity goes a long way. I do also fully accept that my car is becoming something decidedly NOT "Porsche" in the process.

ibkevin

..spring tension is a smart way to go, I think I'd rather check clamps as reg maint.

PM me with your smog mech's info.. I can pick up a few Chimichangas on the way.

V2Rocket

...went back to the dyno today to do some dialing-in of a new, larger MAF housing and see if there was any quantifiable gain to be found...i was skeptical but pleased with the results. also swapped were the injectors, the car is now running 55lbers in preparation for supercharged ethanol. of course the DME was told about the larger injectors but the timing/fuel maps were the same as regular NA tune.

there was one more run done after this printout with peak of 129.8 rwhp...and if i were using STD correction instead of SAE it was ~132.

the larger maf housing was sought so as not to limit my power potential with the blower, as the NA-tune maf still breathes through a 2" x 2" hole to mate to the NA airbox. the new MAF is 2x2.4", seemingly not a lot bigger but that's 20% more flow area...the NA tune is "rated" to be capable of 200rwhp, so 20% extra capacity = +40 whp potential.

as far as NA cars though, it's more or less safe to say the MAF isn't going to be the big limiting factor. the red lines are the best from today (today's other runs were a little lower because i was changing fueling as we ran), the blue is the best from the NA-tune, and the green is the best from the stock AFM setup.

more tests to come, for the benefit of the community.

odurandina

nice....

V2Rocket

every little bit counts...car feels awesome.

changes since last update: adjustable cam gear installed, currently at +2* advanced...has options for 1,2,3,4 in both advance and retard as well as straight up factory timing.

replaced all hoses under intake manifold as well as all AOS seals, helps car run smoother and more predictable AFRs...

and a little bit of fuel table tweaking (timing as standard NA-tune)

every time we ran the dyno today it picked up ~0.4hp over the previous run, due to car really getting warmed up. the run in red above is the last of 4 pulls today, and the blue is the best run last time.

so peak number history...all runs are on stock-rebuilt early 1985 NA engine, 9.5:1 cr, all-stock exhaust with CA-legal replacement catalyst...whp/wtq
stock with early dme/afm:
121.6/128.1
standard NA-tune:
126.8/133.2
larger NA-tune housing + 55lb injectors dialed in:
129.8/133.7
large NA-tune housing, 55lb inj dialed in more, +2 cam advance, under-manifold stuff refreshed:
133.4/140.0

V2Rocket

next round of testing will either be +4 degrees cam advance, OR a 60mm throttle body (vs stock 55) just to see if it will gain anything at all...i will do both, but will test one at a time to quantify each step...

preferences which to do first?

Arominus

I'd be curious if the larger TB helped, especially up top where the 8v starts to fall off some.

Also, what ever happened with the SC action?

V2Rocket

long, slow, slow project.
never have time to do it. any and all fab work i can do happens at my other house which i only go to every month or so. i think i might be able to make progress this year lol.

snb13

There's a guy on Amazon selling 90mm throttle bodies, but they require some fab work according to the description. Not badly priced either.

Of course I read somewhere that according to Jim Pasha the stock bodies provide 20% more air flow than we need already.

V2Rocket

90mm is stupid big, there's no point for that. plus youd have to adapt the TPS to work. mine is a bored-out 944 TB so its all bolt on.

the Ford 4.6 V8 comes with a 65mm body stock for 260hp...but those guys do consistently find a few more HP here and there (maybe 5-6) just by going to 70 or 75mm tb's (and the corresponding intake elbow between TB and plenum)

i'm honestly not expecting anything from the TB since the 55mm the NA uses is the same as the 951, the 944S, S2, and 968 which all make way more power...but who knows? refresh951 gained a lot of top-end power on his stroker turbo by going from stock to a 65mm tb so maybe there's something to be found on a NA

snb13

No, I agree. Just thought it was interesting. What made him develop it for the 944 in the first place? He also does a number of other cars.

V2Rocket

this one?

that one is sold as a universal piece for lots of cars