Best Intake For An 87
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
plus all of this has to be used with an aftermarket base
i wouldn't use some good runners with a stock base because of a possible bottleneck effect
i would throw in an Accel/Edelbrock/Bigmouth base to get every bit of performance of the upgrades.
i wouldn't use some good runners with a stock base because of a possible bottleneck effect
i would throw in an Accel/Edelbrock/Bigmouth base to get every bit of performance of the upgrades.
Thread Starter
Drifting
Joined: Nov 2009
Posts: 1,341
Likes: 2
From: Perth Western Australia
St. Jude Donor '10
You want to read this article :
when i was considering my intake/head/cam upgrade i collected lots of information ...hope it helps :
Stock TPI (410hp, 500lb-ft)
Edelbrock High-Flo (431hp, 501lb-ft)
Extrude Hone base & LTR (451hp, 534lb-ft) ***
TPIS Big Mouth System (460hp, 534lb-ft)
ASM Siamesed Runners (464hp, 510lb-ft) ***
SLP T-Ram (466hp, 495lb-ft)
Accel SR (480hp, 506lb-ft) ***
Holley single plane (493hp, 480lb-ft)
HSR (501hp, 493lb-ft)
MR (505hp, 471lb-ft)
Performer RPM/750--323HP@5250/353TQ@4250... Ave-256HP/341TQ
RPM/Holley PJ TBI--333HP@5000/367TQ@4500... Ave-264HP/349TQ
Stock TPI----------296HP@4750/367TQ@3250... Ave-248HP/336TQ
ASM LTR (GM base)--328HP@4500/403TQ@4000... Ave-273HP/366TQ
Accel Super Ram----329HP@4750/378TQ@4000... Ave-260HP/347TQ
TPiS Miniram-------328HP@5250/355TQ@4500... Ave-257HP/341TQ
RPM ---- ASM ---- FIRST ---- MR
2500 ---- 183 ----- 175 ----- 175
2750 ---- 215 ----- 200 ----- 200
3000 ---- 242 ----- 235 ----- 220
3250 ---- 268 ----- 265 ----- 240
3500 ---- 300 ----- 295 ----- 268
3750 ---- 318 ----- 328 ----- 283
4000 ---- 332 ----- 350 ----- 300
4250 ---- 350 ----- 367 ----- 325
4500 ---- 358 ----- 375 ----- 348
4750 --- *360*----- 382 ----- 363
5000 ---- 358 ---- *387*----- 377
5250 ---- 350 ----- 374 ----- 387
5500 ---- 328 ----- 362 ---- *397*
Stock TPI
TPiS - Bigmouth and Semi-siamesed LTR
FIRST Injections
Stock TPI------ TPiS ---- FIRST
2000 - 112 ---- 114 ----- 114
2500 - 149 ---- 144 ----- 149
3000 - 187 ---- 178 ----- 194
3500 - 218 ---- 216 ----- 235
4000 - 240 ---- 239 ----- 258
4500 - 253 ---- 262 ----- 274
5000 - 236 ---- 252 ----- 262
RPM - FIRST - MiniRam - AZ Speed & Marine
2500 - 175 ---- 175 ----- 180
3000 - 237 ---- 222 ----- 238
3500 - 295 ---- 263 ----- 295
4000 - 350 ---- 300 ----- 325
4500 - 377 ---- 350 ----- 352
5000 - 388 ---- 375 ----- 350
5500 - 366 ---- 398 ----- 330
The FIRST made 443 TQ vs the Miniram's 395 TQ at 3500 rpm (+48)
The FIRST made 460 TQ vs the Miniram's 394 TQ at 4000 rpm (+66)
when i was considering my intake/head/cam upgrade i collected lots of information ...hope it helps :
Stock TPI (410hp, 500lb-ft)
Edelbrock High-Flo (431hp, 501lb-ft)
Extrude Hone base & LTR (451hp, 534lb-ft) ***
TPIS Big Mouth System (460hp, 534lb-ft)
ASM Siamesed Runners (464hp, 510lb-ft) ***
SLP T-Ram (466hp, 495lb-ft)
Accel SR (480hp, 506lb-ft) ***
Holley single plane (493hp, 480lb-ft)
HSR (501hp, 493lb-ft)
MR (505hp, 471lb-ft)
Performer RPM/750--323HP@5250/353TQ@4250... Ave-256HP/341TQ
RPM/Holley PJ TBI--333HP@5000/367TQ@4500... Ave-264HP/349TQ
Stock TPI----------296HP@4750/367TQ@3250... Ave-248HP/336TQ
ASM LTR (GM base)--328HP@4500/403TQ@4000... Ave-273HP/366TQ
Accel Super Ram----329HP@4750/378TQ@4000... Ave-260HP/347TQ
TPiS Miniram-------328HP@5250/355TQ@4500... Ave-257HP/341TQ
RPM ---- ASM ---- FIRST ---- MR
2500 ---- 183 ----- 175 ----- 175
2750 ---- 215 ----- 200 ----- 200
3000 ---- 242 ----- 235 ----- 220
3250 ---- 268 ----- 265 ----- 240
3500 ---- 300 ----- 295 ----- 268
3750 ---- 318 ----- 328 ----- 283
4000 ---- 332 ----- 350 ----- 300
4250 ---- 350 ----- 367 ----- 325
4500 ---- 358 ----- 375 ----- 348
4750 --- *360*----- 382 ----- 363
5000 ---- 358 ---- *387*----- 377
5250 ---- 350 ----- 374 ----- 387
5500 ---- 328 ----- 362 ---- *397*
Stock TPI
TPiS - Bigmouth and Semi-siamesed LTR
FIRST Injections
Stock TPI------ TPiS ---- FIRST
2000 - 112 ---- 114 ----- 114
2500 - 149 ---- 144 ----- 149
3000 - 187 ---- 178 ----- 194
3500 - 218 ---- 216 ----- 235
4000 - 240 ---- 239 ----- 258
4500 - 253 ---- 262 ----- 274
5000 - 236 ---- 252 ----- 262
RPM - FIRST - MiniRam - AZ Speed & Marine
2500 - 175 ---- 175 ----- 180
3000 - 237 ---- 222 ----- 238
3500 - 295 ---- 263 ----- 295
4000 - 350 ---- 300 ----- 325
4500 - 377 ---- 350 ----- 352
5000 - 388 ---- 375 ----- 350
5500 - 366 ---- 398 ----- 330
The FIRST made 443 TQ vs the Miniram's 395 TQ at 3500 rpm (+48)
The FIRST made 460 TQ vs the Miniram's 394 TQ at 4000 rpm (+66)
Racer
Joined: Sep 2008
Posts: 387
Likes: 2
Melting Slicks
Joined: Nov 2008
Posts: 2,765
Likes: 5
Whenever You see published Horsepower & Torque Figures,
Dont study them too in depth.
There are a lot of variables that may affect the actual result on your own car with the same parts installed.
Namely:..........................
What was the Dry Air temperature that day ?
What was the relative humidity ?
What was the Barometric pressure ?
Every engine has different thermodynamic characteristics and thermodynamic efficient levels if You dont run exactly the same parts, heads, pistons, rings, ect.
Selodom published numbers !.....................
WHAT WAS THE EXACT AIR TO FUEL RATIO THEY WERE USING DURING THE TESTS(ADJUSTMENTS TO GET THERE) AT WOT ?
DID THEY LEAN OUT THE ENGINE(15:1) ?
OR DID THEY RUN IT RICH (11:1 - 13:1) ?
I have some of my engines dynoed in the past, Superflow engine dynos in the Chicago area.
All variables listed above will adversely affect Your results.
Sometimes 20 to 50 Horsepower.
The 1985 Corvette was one of the hardest running bone stock TPI engines in my opinion. Was also rated the lowest in published HP and Torque.
Higher thermodynamic effieciency in place. Leave at that so others can ponder how and why. And say that I am full of it @#$^^ once again. LOL
1987 Corvette TPI's ran good too.
Speaking from experience driving them all bone stock or riding shotgun.
Build for Torque and Horsepower will always follow.
Good advice for street use.
500 to 800 ft/lbs at the engine flywheel will scare the crap out of any C5 or C6 owner when you are door to door with them. Rolling at 30mph.
Then punch it. Dont lift.
The other New Vette owners may not be smiling for much longer.
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
That was the philosophy on the L98's but it's widely criticized.
Interesting lay into it smoking the tires while your "opponent" pulls away. If he's not smiling, he'd be shaking his head.
(Don't get me wrong, I built for torque with ~500ft/lbs at the FW. It's fun as h$ll and it'll run out well enough to keep up with/beat most anything on the street BUT I don't intentially smoke 'em for fun/effect.)
Build for Torque and Horsepower will always follow.
Good advice for street use.
500 to 800 ft/lbs at the engine flywheel will scare the crap out of any C5 or C6 owner when you are door to door with them. Rolling at 30mph.
Then punch it. Dont lift.
The other New Vette owners may not be smiling for much longer.
Good advice for street use.
500 to 800 ft/lbs at the engine flywheel will scare the crap out of any C5 or C6 owner when you are door to door with them. Rolling at 30mph.
Then punch it. Dont lift.
The other New Vette owners may not be smiling for much longer.
(Don't get me wrong, I built for torque with ~500ft/lbs at the FW. It's fun as h$ll and it'll run out well enough to keep up with/beat most anything on the street BUT I don't intentially smoke 'em for fun/effect.)
Race Director
Joined: Sep 2003
Posts: 16,839
Likes: 341
From: Database Error Indiana
I didnt read the whole thread, but after messing with an Edelbrock base and AS&M runners for 2 years the intake below got me nearly .3 in the 1/4 mile.
And R&R is no hassel..
[IMG][/IMG]
Uploaded with ImageShack.us
And R&R is no hassel..[IMG][/IMG]
Uploaded with ImageShack.us
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Thread Starter
Drifting
Joined: Nov 2009
Posts: 1,341
Likes: 2
From: Perth Western Australia
St. Jude Donor '10
I didnt read the whole thread, but after messing with an Edelbrock base and AS&M runners for 2 years the intake below got me nearly .3 in the 1/4 mile. And R&R is no hassel..
[IMG][/IMG]
Uploaded with ImageShack.us
And R&R is no hassel..[IMG][/IMG]
Uploaded with ImageShack.us
Last edited by Lemme; Oct 17, 2010 at 06:09 PM.
Race Director
Joined: Jun 2004
Posts: 13,969
Likes: 710
From: WI
I've had several different intakes and I am very happy with the MR/355 CID combo. With the hot cam and ported 113 heads it pulls hard to 6,300 RPM. It's easy to work on and doesn't weigh a ton. Having a large RPM power band is exhilarating compared to the 4,500 RPM dud intakes.
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Melting Slicks
Joined: Sep 2010
Posts: 2,422
Likes: 204
UN-fortunately the HSR needs to be milled around 1 inch for the Vettes
most conversions I have scene Mod angle mill...
I wanted to install my welded 1206 port HSR on my LT1 vette
I did measure the LT1, HSR, TPI intakes <> TPI is the tallest in back
but GM angled it in front.. due to the Vette is the Proto type car
most conversions I have scene Mod angle mill...
I wanted to install my welded 1206 port HSR on my LT1 vette
I did measure the LT1, HSR, TPI intakes <> TPI is the tallest in back
but GM angled it in front.. due to the Vette is the Proto type car
