I've heard that SLP makes pretty good runners. At $250 its a pretty good deal. Can any other company beat their runners yet still stay under $300?

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"Though I cruise through the valley of Rice I shall fear no turbo, for torque art with me."
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1985 IROC-Z w/T-tops, 305 out and 350 L98 TPI engine in, Hooker Super Comp Headers, 3" Hooker Super Comp Cat-Back, 3" CatCo Cat, Rebuilt TH700R4 with Shift kit, 3.73 Richmond gears, Auburn differential, Accell SuperCoil, Accell 8mm racing wires, BBK AFPR, Homemade Ram-Air (thanks to Andris Skulte), MAF screens removed, Dropped A/C, TB coolant bypass, Hurst Dual-Gate Shifter, Air Foil, K&N filters, Holley performance fuel pump, Spohn Subframe Connectors, Re-located Spohn Lower Control arms, and more to come.

 

as far as price no unless you get in on a group purchase the slp's are strait forward and are easier to siamese which when done will outflow the other runners for the same price....

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87 trans am,gm crate 350(4 bolt mains 10to1),L98 aluminum heads,LT4 hot cam,slp runners,slp 1 5/8 headers,3in.y-pipe,edelbrock base,hi flo cat,air foil,afpr,as&m ported plenum,gutted airbox,t-5 tranny w/centerforce clutch and a 3.27 9bolt(11.9in. brakes),ed wright's fastchip,relocated iat sensor,160 fan switch,tb bypass,accel supercoil,cap& rotor,hollowed maf,slp 3in. catbcak.

FOR SALE!FOR SALE!FOR SALE!FOR SALE!FOR SALE!

EVRYTHING IS FOR SALE WITH MY CAR (EXTRA ENGINE,TPI INTAKES,RUNNNERS,PLENUMS,ECM W/CHIP,ETC.
GETTING OUT OF THE 3RD GEN MARKET BEST OFFERS
CONSIDERED!!!!!!!!!!!

 

If you are going to post that the SLP's will outflow all other aftermarket runners, then you better post some flow #'s to back it.

SLP runners are inexpensive. There are better choices, but they cost more money. I like AS&M runners. Try searching the archives, there have been many discussions on this topic.

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Jed
89 Formula 350

 

yep get the AS&M runners and lose what the TPI is designed to do. Yea the flow more, at a loss of velocity which means a loss in Torque in the lower RPMS which is what the TPI is all about. ITs funny how everyone seems to say that a larger throttle body kills performance because of lost velocity, but nobody ever thinks about the loss of velocity in the intake runners.

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89 Trans Am Turbo 3.8L All stock 43,000 miles #1053 of 1555

Past Thirdgen:
86 Trans Am w/ built 355TPI with SLP goodies and too much other stuff to List. One sweet *** car, wish I would have had a good enough Job to pay insurance on three cars so I could keep it, but for a 89 Turbo Trans Am w/ Low miles, I think I made the right choice!

 

well if u are looking for BEST flow numbers... u want TPIS's large tube runners *not siamise* but thats just best flow numbers/ HP.. not best cost... I am starting my 406 project *500 hp* and i went with a 58mm T.B. from BBK *cause it was $299 vs $500* i went with TPIS's big mouth*cause i need to port the intake even more* and tpis's large tube runners *more flow and better HP #'s over the rest out there.. but the cost WAS kinda high, but worth it* and my stock plenum but ported as well* so u can have a totally kick *** tpi set-up for just over $1000. BUT in my case, im not going to be going over 6500 rpms, so i didnt opt for the mini-ram. plus the mini-ram HP/TQ sucks SO much at low rpm. and u dont see DECENT hp/tq #'s till almost 4000-4500 rpms!!! Once i fix my scanner ill post some pics/flow #'s to prove it.

[This message has been edited by aziroc (edited August 02, 2001).]

 

HIgh flow numbers mean no vaccume in a 305 or 350. Now I can understand on a 406 you eill need that stuff, but that is way over kill on a 305 or slightly modded 350. There would be no velocity created by the runners, and this will be bad in a TPI thats how the whole system is buillt to do, it almost has a ramming effect because the valve is made to open on the 2nd harmonic of the air wave in the "Tuned" intake runer port.

 

To Kyle F: I'm not downing you, but I have an 88' TA with a 305, with all those parts, just mentioned(minus the 58mmTB), and I have torque and hp up the a**. My vacume is fine at a steady 14hg. So your statement is not true about that setup on a 305, unless your talking a stock cam and chip.

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88'TA 305TPI 330HP, NATURALLY ASPIRATED, PASSES N.J. EMMISIONS. "I AM JUST THAT GOOD"

 

All this talk of low-end torque just boggles my mind. Every dyno chart for a large-tube or miniram set I've seen, shows torque gains at <U>all</U> rpms vs stock or mildly modified. Just how much bloody low-end torque do you want? Personally, I don't want to have to run slicks on the street(poor rain traction etc.,... ). A properly set-up ASM SS LTR will make more average torque than just about anything short of a diesel. A Miniram does not have to rev to 6500 rpm to be useful, it can be set-up to work quite nicely at a 5500 - 5800 rpm peak if that's what you want.

AZIROC,

Thought I'd pass along some numbers for ya, seein' as you're going the large x huge route

Intake...............length ...... port in ---- out
Stock GM Base- 6.375"------1.47"--- 1.96x1.2
TPiS base------- 6.125"------1.75"--- 2.09x1.28
Accel base------ 6.125"------1.75"--- 2.09x1.28

As you can see, the TPIS and Accel bases are pretty close(and the price is almost the same too). The difference is that, the TPIS unit is an Edelbrock base that has been ported. The Accel piece is unported, and should have more room for growth when you upgrade to huge x ohmygod.

[This message has been edited by 88IROCs (edited August 04, 2001).]

 

Does any one have any port and length numbers for AS&M's runners?

------------------
"Though I cruise through the valley of Rice I shall fear no turbo, for torque art with me."
-----
1985 IROC-Z w/T-tops, 305 out and 350 L98 TPI engine in, Hooker Super Comp Headers, 3" Hooker Super Comp Cat-Back, 3" CatCo Cat, Rebuilt TH700R4 with Shift kit, 3.73 Richmond gears, Auburn differential, Accell SuperCoil, Accell 8mm racing wires, BBK AFPR, Homemade Ram-Air (thanks to Andris Skulte), MAF screens removed, Dropped A/C, Dropped A.I.R, TB coolant bypass, Hurst Dual-Gate Shifter, SLP Air Foil, K&N filters, Holley performance fuel pump, Spohn Subframe Connectors, Re-located Spohn Lower Control arms, and more to come.

 

All your vacume comes from that small *** TB, good combo though. I mean if your engine is pulling enough air to cause a vacume fine, but I bet you would be surprised to find out that your runners are no full and that is why it works so well, no resistance, no turbulance due to the fact that every bit of ait goes to the cylinder. Not bad, but its not the way the TPI was designed to work, yours is working more they way a LT1 works.
If you read the design process and other tech info on the engineering side you would see what I am talking about. THe TPI is torque the LT1 is HorsePower and the sweet sweet LS1 is a good compromise between the two that works better than anything so far, but now that I think about it sice your motor is operating like an LT1 and has runners for a TPI, hmmm actually yours is running like a LS1. Pretty cool.


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89 Trans Am Turbo 3.8L All stock 43,000 miles #1053 of 1555

Past Thirdgen:
86 Trans Am w/ built 355TPI with SLP goodies and too much other stuff to List. One sweet *** car, wish I would have had a good enough Job to pay insurance on three cars so I could keep it, but for a 89 Turbo Trans Am w/ Low miles, I think I made the right choice!

 

I have an Ported Edelbrock intake and AS&M Runners along with a Ported plenum and Vacume is at 21hg at idle, but thats with the 48TB

 

Figure that the stock TPI is terribly undersized for a 350, even a little small for a mildly modded 305.

A hi-flow manifold,fully ported plenum,AS&M or Accel runners,52mmT/B,and a good set of headers will make the STOCK motor perform to it's full potential. Vacuum/runner tuning is one thing, but choking the motor is another. You can 'tune' whatever is there only so far before you have to go larger. Think of a hose where the faucet end is 2" wide,the middle is 5" wide,then the outlet is 2 3/4" wide. Is isn't going to flow correctly,no matter how you 'tune' the hose. Now,the LS1 is almost perfectly spaced hose. That is why they run so damn good.

 

Hose annology is wrong, if you have sufficient vacumw all you will get is a Higher velocity in the smaller sections and a lower one in the larger sections. Basic physics formula.
Area1*Velocity1=Area2*Velocity2
Now if its just running out of the Faucet, you are correct it will not flow well, but remember air is still a fluid and acts the same as water in movement, just with a lesser density so some things do change. BUt if you pull a 21mm hg vacume at the other end you would get plenty of flow

------------------
89 Trans Am Turbo 3.8L All stock 43,000 miles #1053 of 1555

Past Thirdgen:
86 Trans Am w/ built 355TPI with SLP goodies and too much other stuff to List. One sweet *** car, wish I would have had a good enough Job to pay insurance on three cars so I could keep it, but for a 89 Turbo Trans Am w/ Low miles, I think I made the right choice!

 

Hook up a vacuum to your exhaust pipe and what you just said would be true.

 

I can BEAT SLP RUNNERS EASY.... I made my own out of cherry wood.

 

Nope I am talking about in the intake ports that lead to the heads. The engine creates the vacume. Thats why smaller ports provide more low end power and larger ports operate up top.
The smaller ones can only flow so much air at the vacume the engine is producing so when they get in high rpm you have a lot of velocity, but are not filling the chambers properly.
Though open them up and increase the CFM coming in and boom you get more power at the cost of losing low end grunt.
This is why a Vtec makes suck great power out of a 1.8L displacement. If honda would ever build a V8 like that and go ***** out...um wait never mind they do it in INDY cars. THough if they would put that into the NSX it would be damn near untouchable for a street car.

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89 Trans Am Turbo 3.8L All stock 43,000 miles #1053 of 1555

Past Thirdgen:
86 Trans Am w/ built 355TPI with SLP goodies and too much other stuff to List. One sweet *** car, wish I would have had a good enough Job to pay insurance on three cars so I could keep it, but for a 89 Turbo Trans Am w/ Low miles, I think I made the right choice!

 

honda, like all japanese car makers has agreed to a 280hp "limit" on their cars. I think that says a lot about the kind of cars they are making. just a thought