Team Chevelle banner
Cancel
Create thread New Garage Forums

Fast pump gas sbc with tall gears ?

Jump to Latest
1 - 20 of 31 Posts
S

SportsmanRacer

· Registered
Joined
·
85 Posts
Discussion starter · #1 · (Edited)
Has anyone here built any fast pump gas small blocks running tall street gears like 3.55-3.73 with 275/28” tire in an average weight muscle car around 3600 lbs running in the 10 second range ?

I would love to hear what you have done and how it worked out for you as I’m looking for some ideas on a good combo for my next build. I’m currently running a very old (early 2000) stock block iron headed 434 I built and it’s getting tired after years of service. I had my mind on maybe going with a 3.75” stroke this time
 
#2 ·
I would think your going to need that 434. Get a good solid roller with 11 to 1 compression and the best heads and you might get a 10.99 run. Good converter and chassis are a must though.
 
#3 ·
SportsmanRacer said:
Has anyone here built any fast pump gas small blocks running tall street gears like 3.55-3.73 with 275/28” tire in an average weight muscle car around 3600 lbs running in the 10 second range ?

I would love to hear what you have done and how it worked out for you as I’m looking for some ideas on a good combo for my next build. I’m currently running a very old (early 2000) stock block iron headed 434 I built and it’s getting tired after years of service. I had my mind on maybe going with a 3.75” stroke this time
Click to expand...
We did run 10.7s with a 3.73 gear 406 in a 71 Camaro, power steering, turning fan, turning the alternator, drag radial, but it only weighed 3300 pounds, but that was a long time ago. But it was a very mild engine. And it was always driven to the track.
 
Discussion starter · #6 ·
VORTECPRO said:
We did run 10.7s with a 3.73 gear 406 in a 71 Camaro, power steering, turning fan, turning the alternator, drag radial, but it only weighed 3300 pounds, but that was a long time ago. But it was a very mild engine. And it was always driven to the track.
Click to expand...
Did you ever drag test the 580hp 406 you used to offer? That was quite an appealing combo from memory!
 
#7 ·
My car meets those requirements and runs quicker than 10's. It's a 427SBC with a Procharger, Holley Dominator EFI and a flex fuel sensor so it can run pump gas and/or E85 and has a 3.50 gear with 30" tires and weighs 3,700. Soon it will be running on E85/91 octane for driving and methanol when under boost.

Image
 
owns 1969 Chevrolet El Camino SS396
View garage
  • Like
Reactions: ourflat and WHT/73
Save
Reply Quote Like Like
#8 ·
My son went a 10.90@123.8 on shell super.
All steel all engine driven accessories FULL exhaust full interior.
10.5:1 406.
Oh yeah with 3.42 gears!
3585lbs with him in it.
79 Malibu.
 
#9 ·
My 69 is good for low 11s w/o the nitrous. It's 4150lbs (w/ me in it). 427 sbc, Dart LilM, 210 AFRs, 11:1 CR, 248/254 HR (CC 3318/3319 lobes on a 112 lsa), full manual TH400, 3.55 12 bolt, 275/60 15s. I hit a 10.9 once when the weather was just right and I used the TB for launch. The car has AC, power windows/locks, and probably too many other creature comforts.
 
#11 ·
My Vortec 406 will run on pump gas and sports 4.10 gears but with the 30" tires it's like having 3.73's in the car, weights around 3450. I ran 10.90's with it. Mild (well what I would call mild) combo and not much money into it either.
 
Discussion starter · #13 ·
Steve69SS396 said:
My car meets those requirements and runs quicker than 10's. It's a 427SBC with a Procharger, Holley Dominator EFI and a flex fuel sensor so it can run pump gas and/or E85 and has a 3.50 gear with 30" tires and weighs 3,700. Soon it will be running on E85/91 octane for driving and methanol when under boost.

View attachment 798528
Click to expand...
Your combination is really nice. No doubt about it! Did you ever run it n/a before adding that procharger to the mix ?
 
Discussion starter · #15 ·
MadmanMark said:
My 69 is good for low 11s w/o the nitrous. It's 4150lbs (w/ me in it). 427 sbc, Dart LilM, 210 AFRs, 11:1 CR, 248/254 HR (CC 3318/3319 lobes on a 112 lsa), full manual TH400, 3.55 12 bolt, 275/60 15s. I hit a 10.9 once when the weather was just right and I used the TB for launch. The car has AC, power windows/locks, and probably too many other creature comforts.
Click to expand...
your combo should easily run 10’s at my weight. What transmission and converter are you running? And what was the mph in your 10.9x run?
 
Discussion starter · #16 ·
68Chevele said:
My Vortec 406 will run on pump gas and sports 4.10 gears but with the 30" tires it's like having 3.73's in the car, weights around 3450. I ran 10.90's with it. Mild (well what I would call mild) combo and not much money into it either.
Click to expand...
I have followed along your progress with the Vortec 406 and i have to say it’s very impressive! Do you have any future plans for it?
 
#17 ·
SportsmanRacer said:
that sounds great. Great mph for that et so it has some good power! Do you have more information about that combo?
Click to expand...
Sure,
It's a 10.5:1 406. Comp Custom HR 245/253 @.050 .635/650 on 109 with comp short travel lifters , Comp Ultra Mag
Rockers, Brodix single plane with Nickerson 950 with tapered spacer. AFR 220 comps with 64 chambers.
Moroso pan with melling shark tooth pump.
1-3/4"- 1-7/8" step Dynatech headers to full 3" to X pipe to ultraflo mufflers over the axle to behind tire like GN exhaust.
7 blade clutch fan PS pump, mech water pump ,alternator oh and a autozone stock replacement fuel pump and 3/8" steel lines from stock tank.
Keep in mind this is with 3.42's!
Stock GN 8.5 rear.
 
#18 ·
SportsmanRacer said:
your combo should easily run 10’s at my weight. What transmission and converter are you running? And what was the mph in your 10.9x run?
Click to expand...
TH400 full manual with a Hipster transbrake and PTC 3600 converter. I'm typically 118-119 but the 10.9 run was just under 118 (at an NMCA race tnt and the track was hooking real good).
 
#19 ·
WHT/73 said:
Sure,
It's a 10.5:1 406. Comp Custom HR 245/253 @.050 .635/650 on 109 with comp short travel lifters , Comp Ultra Mag
Rockers, Brodix single plane with Nickerson 950 with tapered spacer. AFR 220 comps with 64 chambers.
Moroso pan with melling shark tooth pump.
1-3/4"- 1-7/8" step Dynatech headers to full 3" to X pipe to ultraflo mufflers over the axle to behind tire like GN exhaust.
7 blade clutch fan PS pump, mech water pump ,alternator oh and a autozone stock replacement fuel pump and 3/8" steel lines from stock tank.
Keep in mind this is with 3.42's!
Stock GN 8.5 rear.
View attachment 798589
Click to expand...
What trans & converter? (sorry if I missed it in a previous post)
 
#20 ·
SportsmanRacer said:
Your combination is really nice. No doubt about it! Did you ever run it n/a before adding that procharger to the mix ?
Click to expand...
Thanks. Yes I ran it at the track 10 years ago when it had an old set of AFR 210 heads that I purchased in 2000. It ran 10.41 at 128. I put it on a chassis dyno shortly after that and picked up another 40+ RWHP so it probably would have run 10.20's.

Image
 
owns 1969 Chevrolet El Camino SS396
View garage
Save
Reply Quote Like Like
1 - 20 of 31 Posts
About this Discussion
30 Replies
11 Participants
Last post:
SportsmanRacer
Team Chevelle
posts
5.3M
members
131K
Since
1998
A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more!
Full Forum Listing
Explore Our Forums
Bench Racing Performance Engine Chevelle Tech Body Shop