Again with the old How much HP/TQ question but i think im deciding what to do,last year i told you guys that this midyear i was planning to purchase some aftermarket heads,im collecting the money to get some AFR 180's.- After that..this is my goal for the intake (if i not choose FIRST intake)
- Siamesed Plenum
- Siamesed SLP Runners
- Edelbrock Baseplate (what's the difference between #3860 and #3861 ??)
- Edelbrock 52mm TB (not sure)
This all coupled to :
- .30 over L98
- ZZ4 Camshaft Duration @.050 208/221 Lift: .474/.510 112 LSA
- Hypereutectic flat tops
- 1.5 Gold Crane Roller Rockers
- 1 5/8 Longtube headers
- AFR 180 heads
That would be a nice combination if you're looking for low end torque. HP will drop off 400-500 RPM higher than the stock TPI. When compared with other intakes, The siamesed runners produce less HP than the super ram, Holley stealth ram or TPiS mini ram due to the length of the runners and resulting lower RPM power band. The trade is that you keep more low end torque. It really comes down to what kind of performance you're looking for.
I'm just guessing, but you could see 400 HP with 425 torque at the crank. There's only one way to know for sure.
Yes i like the low end torque,i love it
and i want to retain it but i want a little more fun
That's why im thinking about this way 420 would be sweet !
With a better cam, I predict 400hp/450hp at the crank. You'd need more intake duration to have a chance. The superram cam wouldn't be a bad choice (LPE 219/219). A custom 214/214 wouldn't be recidulous either (if you want a bit more low-end stomp). With 1.5 rockers, XE or XFI lobes would get lift about where the 180's need it.
IIRC, the 3860 is the correct baseplate. The other is for vortec heads.
I Still wonder what's the difference between #3860 and #3861
This is what they say :
High-Flo Baseplate Only (1985-92 centerbolt engines) #3860
High-Flo Baseplate Only (aftermarket and early model heads) #3861
I knew i needed to change the cam,but i don't want to pull the motor
What if this baseplates are worked ? can they be ported as well ?
Thanks !
btw...i thought about using a vortec tpi base + vortec heads
but i think the AFR's will be a lot better.-
Sorry, the 3861 is for pre-1985 cars w/o EGR. You still want the 3860.
You can port these bases as well. And, you will want to gasket-match it to the SLPs. And, port the living daylights out of the SLPs (with mega-porting/siamesing. Or just use good tubes like TPIS/ASM.
FWIW: If you don't buy the 52mm and AFRs, you could get pretty darn close to the same results with other heads and be able to get your intake now. Vortecs with a Vortec TPI would pull pretty darn good -- probably within 5% of the AFRs.
Yes i think Corvetteplenum.com has some nice SLP's any experiences with them ?
i think this is the TPI to its limits....is this like the ultimate "tpi looking" build ?
Short of a FIRST intake it is.
If you don't port and port and port, using a TPIS/ASM runner could work just as well out of the box. SLPs have smaller diameter and need more work.
From pics, I couldn't tell that Corvetteplenum goes down the runner at all. You'll have to ask Mike about that. (BTW: He ports 'em, doesn't sell 'em.)
If not, you can get a bunch removed with a drill-bit extension (1/4" shank) and 1 1/2" wire-wheel + flap wheels. You might also need a burr for your porting -- depending on what you pay others to do.
Honing is another option but costs a bunch. You could hone the runners, and port the base yourself. Much, much easier. Or just buy ASM/TPIS tubes.
or should i forget all of this sucky plenums,runners and bases and give a success
amazing shot and put all my effort and invest in the FIRST intake ?????
Would love to know how much HP/TQ is the FIRST capable of !
- I Don't want to change my cam , will my ZZ4 Cam be enough for the FIRST ?
- Badss says that if the car is more street than race...you should use the aftermarket TPI setups (SLP's edelbrock bases ..etc) im confused ....
- i don't want to lose lowrpm torque !
i need to decide
Calderone with real good heads you dont need a lot of cam, especially since youre after torque. You can upgrade later but I have a feeling you wont feel the need to. TOo many guys cam their TPIs like carbed motors and are sorely dissapointed. Granted yours is a small cam but it will work fine.
Yes cuisin,what im trying to do here its a plan.-
Im trying for 2 years to build my engine the way i want
the way i want it to perform (with the help of all of you of course)
this is a neverending project,but i will acomplish it very soon so to speak.-
- im all sold to AFR 180's.- That's a must .-
im looking for the next step.-
and i have 2 choices : The first setup or ...edelbrockbase+ported runners and plenum.-
i want max torque down but ...a bit more of hp.-
i never race the car,but if i do ? i dont want to be in shame !
i already have 2400 holeshot converter ,shift kit and 3.07 gears .-
Listen to Cuisinart about the cam. Leaving a small bit of cam on the table while opting for the AFRs is not a bad move. Small cams do extroadinarily well with great heads. Your "ideal" cam may only leave 10-15HP on the table, but your low-end will be as strong as it can get. You'll be as strong as other head options out there -- even with a smaller cam.
I'm curious why you're disappointed after reading the biggest FIRST intake's thread. I don't think there's much to be disappointed about. There are clear measurements inside that thread showing the FIRST provides a good chunk more HP while losing VERY little over the best alternative TPI setups. It's a win-win.
The FIRST will provide the extra HP you want while providing the best low-mid torque possible for street use.
Corvette Store
How much HP / TQ would this combo make ?
