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Tony Mamo told me his ported Fast 78 would make as much if not more than a stock 102. If anyone would know it's him
Yeah that was the old 102 without the removeable runners. There really isn't much to port in the runner area anymore despite what anyone says. Yeah you can grind away and make a pile of plastic but the new runners are a separate molded piece. Smooth as glass. That big ridge on the wall of the port where the two halves were put together is a thing f the past.
Yeah maybe he was referring to the old 102, but I dont know for sure. I do know it was about two years ago when he told me that, so I assume he was comparing it to the one at the time
Yeah that was the old 102 without the removeable runners. There really isn't much to port in the runner area anymore despite what anyone says. Yeah you can grind away and make a pile of plastic but the new runners are a separate molded piece. Smooth as glass. That big ridge on the wall of the port where the two halves were put together is a thing f the past.
last i checked weren't the removable runners only available for square port intakes?
Ok so I started this thread asking if If I should/can port my fast 78 to a 90/92 Tb a few people said it can’t be done or isn’t necessary. But I was reading on another forum a guy ported his Ls6 intake and and installed a 90mm Tb on his Ls6 so why wouldn’t I be able to put a 90/92 mm Tb on my fast 78?
Ok so I started this thread asking if If I should/can port my fast 78 to a 90/92 Tb a few people said it can’t be done or isn’t necessary. But I was reading on another forum a guy ported his Ls6 intake and and installed a 90mm Tb on his Ls6 so why wouldn’t I be able to put a 90/92 mm Tb on my fast 78?
If you look at post #4 that I made, I pose the same thought.
Yeah that was the old 102 without the removeable runners. There really isn't much to port in the runner area anymore despite what anyone says. Yeah you can grind away and make a pile of plastic but the new runners are a separate molded piece. Smooth as glass. That big ridge on the wall of the port where the two halves were put together is a thing f the past.
yes very little to port on a fast 102. At most it just needs a port matching at the base. Which you can’t do without the heads. So buying a ported fast 102 off the shelf is kind of a waste
Ok so I started this thread asking if If I should/can port my fast 78 to a 90/92 Tb a few people said it can’t be done or isn’t necessary. But I was reading on another forum a guy ported his Ls6 intake and and installed a 90mm Tb on his Ls6 so why wouldn’t I be able to put a 90/92 mm Tb on my fast 78?
What you are thinking of is a TPI manifold. TPI is a peformance shop which offers 90MM snout welded to an LS6 manifold. The whole operation costs $350-400, and you supply the LS6 intake. Its worth about 5-6 HPs. It is not really something you should try yourself unless you have plastic welding skills.
What you are thinking of is a TPI manifold. TPI is a peformance shop which offers 90MM snout welded to an LS6 manifold. The whole operation costs $350-400, and you supply the LS6 intake. Its worth about 5-6 HPs. It is not really something you should try yourself unless you have plastic welding skills.
the guy that put the 90mm snout on his Ls6 said he gained 20rwhp so my main question hear is there’s a kit that simply allows a 90/92 mm Tb straight onto the fast 78 so it’s obviously going to make some sort of gains and it’s not much work for it to be done
the guy that put the 90mm snout on his Ls6 said he gained 20rwhp so my main question hear is there’s a kit that simply allows a 90/92 mm Tb straight onto the fast 78 so it’s obviously going to make some sort of gains and it’s not much work for it to be done
First, 20 is too many ponies. Its more like 10. Second, TPIs adds the snout to LS6 intakes. So, your intake is a 78 Fast. You need to send them an LS6 intake. By the time you pay them to add the snout, buy a 90mm TB, add a 90 Maf and have the motor tuned, you would be better off getting a used 92 Fast. You have to accept what you have and stop trying to make a dollar out of 50 cents. Either use the 78 as is, or sell it and apply the money to the 92 purchase.
I wouldn't know about that, but that is what's in the pic and description.
I think Dorman still makes them, but started enforcing their price structure, so some outlets quit handling them. They were discounting them pretty heavily, which was not fair to some of the other outlets in Dorman's eyes.
yes very little to port on a fast 102. At most it just needs a port matching at the base. Which you can’t do without the heads. So buying a ported fast 102 off the shelf is kind of a waste
Tell me about it. I looked up inside the runners of my 102 when I took it out of the box and was like....ummm its smooth as glass and then thought well yeah, its going to be because now the runners are a stand alone separate molded piece.
I just bought one, brand new through Amazon last week (under $400, and Summit, Jegs, everyone else sells them for $405)....
I have a remote mounted MAP sensor, that I want to mount onto the intake, which is why I bought the grommets from you.
I "THINK" they (Dorman) stopped making the "LS6" intakes....
To the guy above asking "what the deal is" with these Dorman's...I got just over $500 into the Dorman LS2 ($383), and a WARR 92mm throttle body ($125), and the car feels/runs/drives GREAT....In all fairness, I replaced a stock LS1 intake, and stock, un-touched 78mm throttle body
OP - Sell of what you have the 78 and get what you want the 92. WARR does a 92mm TB for ~$125
To add a new snout to an intake manifold requires precision cutting, special adhesive & drilling. There isn't a kit to do this to my knowledge. The 90mm snout requires sending the LS6 manifold to TPiS or LPE.
I inquired about doing a 90mm snout on my Fast LSXRT to fix the snout angle issue, hoping it would be a simple cut and paste like the LS6 90mm. The estimate was $20,000 because a new upper shell has to be designed, mold made and then molded. Doing a 90 mm snout on a Fast 78 might be less involved than on the LSXRT but still expensive.
Most people and probably about all shops will say sell the fast 78 & old LS6 to buy the Fast 92 & 92 TB that you want.
Of course, you could hack up your Fast 78 and a buy a GM LS2 to cut the snout off of and try plastic welding it together. Odds are unless you're an expert both intakes will end up as scrap.
BTW - I have a LS6 90MM that has the Peak Performance radical port work on my 91 RS with a 383 LS1 and small cam. In actual same condition dyno testing on the RS the LS6 90mm w/Peak's radical porting made 2 whp more than the LSXRT and 3whp more than fast 90/92. With a big cam and high rpm either fast would have almost certainly been better.
The LS6 90mm also had the best drive ability. Putting a $350 snout on the LS6 and $125 WARR TB is a pretty good deal and set up unless your building a 6,500+ rpm set up
My Dorman LS2 intake make peak power at about 6500 rpm with a BTR stage 2 cam. Rev limit is set at 6800 rpm. Considering the price point, it's a good intake.
the guy that put the 90mm snout on his Ls6 said he gained 20rwhp so my main question hear is there’s a kit that simply allows a 90/92 mm Tb straight onto the fast 78 so it’s obviously going to make some sort of gains and it’s not much work for it to be done
Funny I found a 105mm TB on a factory ls7 intake even shows the intake with 105 TB. I had been looking for something along these lines. I had asked the young man @ Peak Performance about doing this as if your getting a 102 why not reach for a 105mm more air = more Hp with using any throttle body Typically.
But all ribbing aside, the wait for the perfect LS7 was worth it, as LPE stepped up their game for Dan’s build. Starting with a forged Callies Dragon Slayer crankshaft, JE pistons and Oliver connecting rods, the foundation for a track star was put into place.
A pair of CNC-ported LS7 heads with a COMP Cams trunnion upgrade, 1.8 rockers and an LPE hydraulic camshaft with 243/259 duration, 691/702 lift and a 112 lobe-separation angle complete the top end. Oh, and so does a *ported LS7 intake. The engine breathes through a Spectre cold-air intake, Holley 105mm throttle body and a LS7 MAF sensor.
1972 Road race Nova : Tremec T-56 GM 12-bolt is a 3-inch steel driveshaft. 3.55 gears, Moser axles and a Detroit TruTrac spool.
produce 571 horsepower to the rear tires
The Nova went through the traps at 11.40 at 127 mph. Keep in mind, dialing in the suspension for the track and the drag strip require completely different settings in most cases.
My Dorman LS2 intake make peak power at about 6500 rpm with a BTR stage 2 cam. Rev limit is set at 6800 rpm. Considering the price point, it's a good intake.
Agreed 100%.
Raced Saturday in near identical weather as last time out, and with no other changes but the swap from LS1 intake/78mm GM throttle body, to Dorman LS2 and WARR 92mm throttle body, Tuned for WOT at same 12.5:1 AFR....picked up almost 4/10ths and 3 (almost 4) mph from best NA run a week and a half prior. $510 investment in intake and throttle body.
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