how much faster could i have been??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ocbaud · 05-27-2004, 06:57 PM

since i only ran a 15.72 at the track, i was wondering how much faster i could have been if i was shifting at the right time.

i didnt have a tach at the time and i thought i was shifting high enough, but it turns out, i was probably only taking it up to about 5200 rpm's.

how much faster could i have ran if i revved it up to peak hp? around 6000-6300 rpm's ??

with the tach hooked up today, i took it up that high and it was was still pulling all the way up till i shifted(around 6100rpms)

**N2TRUX** · 05-27-2004, 07:32 PM

It's hard to say without more info. Have you dynoed the motor yet? Where are you hp/tq peaks at. You need to make sure your shifting while still on the up side of your power band.

Get it on a dyno before you hit the track again. You might be surprised at where your shift points should be...

78' Silverado · 05-28-2004, 12:36 AM

Yea I agree, Take it to a dyno. That will give you good info on where to shift. Plus...dynos are fun as heck. Took the blue truck there, only dyno 140rwhp but...

Still fun lol

ocbaud · 05-28-2004, 12:39 AM

yeah, i think next week i may try to get to one

holley "says" it their kit makes peak power at 425hp@6225rpms'

thats with a 750dp though, compared to my 650 edelbrock

78' Silverado · 05-28-2004, 01:41 AM

dang only a 650. The motor I am building is over 500flywheel hp. Thats good or 460-75 rwhp. And I am gunan run a 750. 650 sounds small to me for ur engine.

76HighSierra · 05-28-2004, 11:54 PM

You really need to swap out those highway gears for something in the range of 3.40 (or numerically higher). THEN you will really see a difference, as the engine will come into it's powerband with much less effort (IE: Faster

) Just swap out that tired old TH350(that is what you have, isn't it?) for a well built 2004R or 700R4. This combined with the lower rear gears and you'll have the best of both worlds....relative economy and be faster. God, I love dreaming up combos, when it's someone else's money at stake.

76HighSierra · 05-29-2004, 12:02 AM

Quote:

Originally Posted by 78' Silverado

dang only a 650. The motor I am building is over 500flywheel hp. Thats good or 460-75 rwhp. And I am gunan run a 750. 650 sounds small to me for ur engine.

Many folks (including me when I was younger) are guilty of "over-carbing" an engine. Even a strong performing 350 only needs a 600-650, unless you plan on it being a race-only toy. On his engine, and with what he seems to be planning on using his truck for, a 650 will more than suffice (if jetted properly). With his kinda lumpy cam and high-rpm head/intake combo, it's power is not the strongest in the low RPM range anyways. A 750 would make it weaker off the line, IMHO.

*1972C10* · 05-29-2004, 01:44 AM

I was unaware Edelbrock Made a 650

phantom dually · 05-29-2004, 11:17 AM

I didnt think so either. The edelbrock is not a performance carb anyway. It is more of a street carb replacement. Go with a good Holley or Demon.

ocbaud · 05-29-2004, 06:59 PM

eldelbrock thunder series AVS carb is 650cfm

phantom dually · 05-30-2004, 01:57 PM

Yeah I seen that at summit after I posted!!

*1972C10* · 05-30-2004, 03:45 PM

i thought he was talkin about a plain perfomer I have heard people talkin about there 650 edelbrocks for years LOL

MylilBowTie · 05-30-2004, 04:04 PM

Does Carter make a 650? I have bought a few "650" edelbrocks

*1972C10* · 05-30-2004, 06:27 PM

Yeah carters make a 625 but no 650.

MylilBowTie · 05-30-2004, 06:31 PM

Oh, just thought that might have been where the mix up started.

05-27-2004, 06:57 PM	#1
ocbaud Garage Queen Material Join Date: Oct 2002 Location: USA Posts: 4,129	how much faster could i have been??? since i only ran a 15.72 at the track, i was wondering how much faster i could have been if i was shifting at the right time. i didnt have a tach at the time and i thought i was shifting high enough, but it turns out, i was probably only taking it up to about 5200 rpm's. how much faster could i have ran if i revved it up to peak hp? around 6000-6300 rpm's ?? with the tach hooked up today, i took it up that high and it was was still pulling all the way up till i shifted(around 6100rpms)

05-28-2004, 12:36 AM	#3
78' Silverado \/ My Loves \/ Join Date: Mar 2003 Location: Midland,Texas Posts: 462	Yea I agree, Take it to a dyno. That will give you good info on where to shift. Plus...dynos are fun as heck. Took the blue truck there, only dyno 140rwhp but... Still fun lol __________________ 78' Silverado - Blue - (In a Coma) 04' Silverado -Red- 383 Stroker in progress for the 78'!!!

05-28-2004, 01:41 AM	#5
78' Silverado \/ My Loves \/ Join Date: Mar 2003 Location: Midland,Texas Posts: 462	dang only a 650. The motor I am building is over 500flywheel hp. Thats good or 460-75 rwhp. And I am gunan run a 750. 650 sounds small to me for ur engine. __________________ 78' Silverado - Blue - (In a Coma) 04' Silverado -Red- 383 Stroker in progress for the 78'!!!

05-28-2004, 11:54 PM	#6
76HighSierra DAMN, I love Big Blocks! Join Date: Aug 2003 Location: New Mexico, USA Posts: 619	You really need to swap out those highway gears for something in the range of 3.40 (or numerically higher). THEN you will really see a difference, as the engine will come into it's powerband with much less effort (IE: Faster ) Just swap out that tired old TH350(that is what you have, isn't it?) for a well built 2004R or 700R4. This combined with the lower rear gears and you'll have the best of both worlds....relative economy and be faster. God, I love dreaming up combos, when it's someone else's money at stake. __________________ Marc Bona Hobbs, New Mexico 1976 1/2 ton GMC High Sierra. 454 c.i.d./ TH400. *Soon to get a mild warming over.* 3.40 rear.

05-29-2004, 11:17 AM	#9
phantom dually Project92 SWB stepside Join Date: Feb 2003 Location: Louisville KY Posts: 4,793	I didnt think so either. The edelbrock is not a performance carb anyway. It is more of a street carb replacement. Go with a good Holley or Demon. __________________ 92 C1500 stepside 496 Stroker Competiton Engineering Ladder bars/QA1 coilovers. Dana 60 rear with 4.10 gear and posi. Bonspeed Palisade 20x12 in rear w/335/30/20 and 20x8.5 front w/245/40/20. 5/8 drop with Belltech springs/DJM spindles/drop shocks. WWS Progress thread http://67-72chevytrucks.com/vboard/s...d.php?t=140448

05-27-2004, 07:32 PM	#2
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,023	It's hard to say without more info. Have you dynoed the motor yet? Where are you hp/tq peaks at. You need to make sure your shifting while still on the up side of your power band. Get it on a dyno before you hit the track again. You might be surprised at where your shift points should be...

05-28-2004, 12:39 AM	#4
ocbaud Garage Queen Material Join Date: Oct 2002 Location: USA Posts: 4,129	yeah, i think next week i may try to get to one holley "says" it their kit makes peak power at 425hp@6225rpms' thats with a 750dp though, compared to my 650 edelbrock

05-29-2004, 01:44 AM	#8
1972C10 Account Suspended Join Date: Dec 2003 Location: Texas Posts: 2,686	I was unaware Edelbrock Made a 650

05-29-2004, 06:59 PM	#10
ocbaud Garage Queen Material Join Date: Oct 2002 Location: USA Posts: 4,129	eldelbrock thunder series AVS carb is 650cfm

05-30-2004, 01:57 PM	#11
phantom dually Project92 SWB stepside Join Date: Feb 2003 Location: Louisville KY Posts: 4,793	Yeah I seen that at summit after I posted!! __________________ 92 C1500 stepside 496 Stroker Competiton Engineering Ladder bars/QA1 coilovers. Dana 60 rear with 4.10 gear and posi. Bonspeed Palisade 20x12 in rear w/335/30/20 and 20x8.5 front w/245/40/20. 5/8 drop with Belltech springs/DJM spindles/drop shocks. WWS Progress thread http://67-72chevytrucks.com/vboard/s...d.php?t=140448

05-30-2004, 03:45 PM	#12
1972C10 Account Suspended Join Date: Dec 2003 Location: Texas Posts: 2,686	i thought he was talkin about a plain perfomer I have heard people talkin about there 650 edelbrocks for years LOL

05-30-2004, 04:04 PM	#13
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	Does Carter make a 650? I have bought a few "650" edelbrocks __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI

05-30-2004, 06:27 PM	#14
1972C10 Account Suspended Join Date: Dec 2003 Location: Texas Posts: 2,686	Yeah carters make a 625 but no 650.

05-30-2004, 06:31 PM	#15
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	Oh, just thought that might have been where the mix up started. __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI

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