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  What would it take to get a 351C to go 7.50's in the 1/8th

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Author Topic:   What would it take to get a 351C to go 7.50's in the 1/8th
Jerry Piner
Gearhead

Posts: 229
From: staunton, va
Registered: Dec 2001

posted 11-01-2002 11:10 AM     Click Here to See the Profile for Jerry Piner     Edit/Delete Message   Reply w/Quote
Was wondering what would it take to get a 351C in a 68 mmustang with a C6 to go 7.50's in the 1/8th?

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kid vishus
Gearhead

Posts: 6590
From: middle of NC
Registered: Oct 2000

posted 11-01-2002 11:14 AM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
Depends on how much you want to spend. I ran 7.50's with 3300# granada wiht a 9-1 compression, hydraulic cammed cleveland. But, it had a c4, a transbrake, and a good convertor.

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Moneymaker
Administrator

Posts: 27499
From: Lyons, IL, USA
Registered: May 99

posted 11-01-2002 11:21 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
You have the right guy answering you Jerry.

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Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
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NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
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Quote #1: "I never met a magazine mechanic I liked."
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Dad Vishus
Gearhead

Posts: 1064
From: Moscow, Iowa, USA
Registered: Dec 2001

posted 11-01-2002 11:24 AM     Click Here to See the Profile for Dad Vishus   Click Here to Email Dad Vishus     Edit/Delete Message   Reply w/Quote
Probably not that much.

When we ran a backup motor in the Granada years ago for most of a season, it had a hydraulic cam with dished pistons, around 8.5:1, bone stock 4V closed chamber heads, Torker with a 750 DP and a C6 with a brake. The car weighed around 3000#. We could have run pump gas but as I recall, we mixed CamII and 91 octane about 50/50. I can't honestly remember what we ran for a gear, but likely it was a 4.70. We ran that gear for several years.

That combo got close to 7.50 in good air.

If your car is in street trim, its probably a bit heavier than that, so it might take a little more motor.

I'd think a decent solid, 4V closed chambers, and flat tops with a similar induction set-up ought to get you close. Changing to a C4 would help a lot also. They use much less HP to operate.

Hope this helps

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Jerry Piner
Gearhead

Posts: 229
From: staunton, va
Registered: Dec 2001

posted 11-01-2002 11:44 AM     Click Here to See the Profile for Jerry Piner     Edit/Delete Message   Reply w/Quote
A freind of mine use to run a 69 Mach 1 he said was pretty basic, it had around 11:5, solid cam, 1050 dominator, C6 with a brake, 3500 stall, don't know what gear but they ran 14x32 slicks. They shifted at 6400 and the car went 6.80's.
I was think something like 10:1, 950HP with stall between 3500-4500 not sure which I run in a footbrake class, 4.56 or 4.86 with 28" tire. Not sure about what intake or cam. Any suggestions welcome.

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clevelandstyle
Gearhead

Posts: 1309
From: central Indiana
Registered: Jul 2001

posted 11-01-2002 12:15 PM     Click Here to See the Profile for clevelandstyle     Edit/Delete Message   Reply w/Quote
I'm running low 7s with a 4V, 10.26:1 compression, 850 Holley DP., small solid (street) roller and C6 with a JPT converter. I'm switching to a rollerized C4 next year and doing some suspension upgrades in my quest for 6s.
In my opinion, getting the power out of a cleveland is the easy part. It's the trans, gears and suspension that makes it hard to get good ET. Basically the whole combo. I used to think I always needed more power to go quicker, but as I've been playing with other parts of the car, I've found great improvements.

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Ben
Grabber Green '70 Mach I 351C 4V
Robbin Egg Blue '79 Fairmont 351C 4V

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kid vishus
Gearhead

Posts: 6590
From: middle of NC
Registered: Oct 2000

posted 11-01-2002 12:44 PM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
Jerry, your idea is pretty good. A torker would work good with that combo, and my torker worked best with a 1" spacer, open or 4 hole, it didnt make any difference on how my car responded, but might since yours is a footbraker (4 hole probably would work best if you have hood clearance).

A small (by my defination) solid cam, flat top pistons, 4v heads, even with stock ports (no port work), a 950 HP or a 750 HP, a 4000-4400 convertor,(clevelands love big convertors), the 4.56 should get you easily into the low 7's, the 4.86 would be better but would be more prone to spin with the small tires.

When I ran a c6, it ran 7.80's, but that motor was really mild and I had 29x11 slicks at that time with a 5.00 gear. A good c4 will knock off almost 3 tenths.

Camshafts, Alex will know best here, but I have ran the comp cam #32-644-5. It ran real good in my car. It is 256/266 @ .050, .589/.615 lift. It might be a little big for your motor and therefore the next one down might be better, its 246/256 @ .050, .564/.589 lift. Personally, I would run the first one, install it 4 degrees advanced, and shift it about 6500.

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67coupe
Gearhead

Posts: 491
From: dallas NC usa
Registered: Nov 2000

posted 11-01-2002 02:09 PM     Click Here to See the Profile for 67coupe   Click Here to Email 67coupe     Edit/Delete Message   Reply w/Quote
i ran that 8.41 on 16 nittos my motor is a .40over block with forged flat tops 70 4bbl heads untouched except for stainless valves a torker and a750 dp 3000 stall,a .500 -.525 hyd cam and 3.50 gears with a cooks c4 which is really a stock c4 with modifyed valve body and good clutches so id think more gear and a little more cam could easily go mid 7's

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Josh
67 coupe with 351c
8.41 in the 1/8
1.90 60'
at 82.03 mph
94 Explorer
30 model A currently rustbucket
in process 67 convt with efi 5.0 and t5

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Just Strokin
Gearhead

Posts: 754
From: Tuscaloosa, Alabama
Registered: Dec 2001

posted 11-01-2002 02:52 PM     Click Here to See the Profile for Just Strokin   Click Here to Email Just Strokin     Edit/Delete Message   Reply w/Quote
In an old Pinto, ran 7.40's with B351 flat tops in a stock block with Crane solid cam grind F-246/3294-2-8, stock B351 heads, Holley Strip Dominator manifold with 800 DP. Transmission was an FMX with 10" street convertor and B&M Manual VB kit with 5.63 gears and 12x30 tires.

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Hans olsson
Gearhead

Posts: 733
From: Sweden
Registered: Apr 2000

posted 11-01-2002 02:54 PM     Click Here to See the Profile for Hans olsson   Click Here to Email Hans olsson     Edit/Delete Message   Reply w/Quote
Our stocker did run 7.42-91mph in good air.
285/310 351C 4v. C4 5300 conv 5.43 gears.
3450 lbs. Lift .430 .450 Dur 260 255 @0.050
Carb is 780 Vac.

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  • 71 Mach1 351c
  • E/SA 11.89-110 mph
  • F/SA 11.76-111 mph

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'69Stang
Gearhead

Posts: 205
From: Detroit, MI USA
Registered: Jan 2002

posted 11-01-2002 03:34 PM     Click Here to See the Profile for '69Stang   Click Here to Email '69Stang     Edit/Delete Message   Reply w/Quote
Some of your times amaze me. Besides slicks what should I do to lower my 60 foot times of 2.008? I ran the 1/8 in 8.2 at like 93 MPH.

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'69 Mustang Fastback, 351C, Holley 950 HP, New Parker Funnelweb,4-v quench heads ported, 10.75:1, UD pulley, windage tray, Top Loader, 3.89 9" rear

[This message has been edited by '69Stang (edited 11-01-2002).]

[This message has been edited by '69Stang (edited 11-04-2002).]

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MattN
Journeyman

Posts: 69
From: Mattoon, IL.
Registered: Feb 2002

posted 11-01-2002 07:53 PM     Click Here to See the Profile for MattN   Click Here to Email MattN     Edit/Delete Message   Reply w/Quote
I have a stock weight 70 Mach 1 that ran 7.69 @ 88.5 mph with 1.65 60' times the first and only time out on slicks this year. The engine is pretty mild. 4V closed heads, forged flattops, Comp 292H cam, excellerator intake, 750Dp, 2" 4 hole spacer, locked out timing, headers, C-4 with a custom convertor that stalls at about 4200, 5.14 gears and 28" slicks. I think the stall convertor is the biggest part of a Cleveland combo. I have a big solid cam to try next year. I want to get the rpms up to about 7000 or so to let the heads work even better. I only had it out on slicks once, I think it has even more in it. I had timing set at 36 and did not change it or the jets. It was the first time with the new C-4, so I was just trying to get used to it.

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jsracingbbf
Gearhead

Posts: 2954
From: Batesville,MS. , U.S.A.
Registered: Mar 2002

posted 11-01-2002 08:08 PM     Click Here to See the Profile for jsracingbbf   Click Here to Email jsracingbbf     Edit/Delete Message   Reply w/Quote
Jerry, I ran 6.70-6.80 in a 2900 lb backhalfed 69 mustang. It had a 351c closed chamber 4V heads, stock rods with ARP bolts, Oil restrictor kit, Torker intake, flat tops approx. 11:1 CR, (best guess), a 246/256 @ .050, .564/.589 lift Comp Cam, good valve train = roller rockers, manley valves; a 950 cfm Alky carb, 2 1/8th in into 3in. collectors, 9" rear gear was 5.43, Powerglitch trans with a 1.76 low gear.

------------------
Jerry Smith
69 Mustang Pro ET Drag
70 Mustang retired former footbrake car
"Crawfish are Lucky! they get their Heads Sucked and their tails eaten!"

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kid vishus
Gearhead

Posts: 6590
From: middle of NC
Registered: Oct 2000

posted 11-01-2002 08:41 PM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
I guess it boils down to a couple of things. First, do you have any cleveland stuff already? If so, what have you got? The heads are the most important part.

Second, how much money are you willing to spend? Clevelands make tons of power, but the heads cant be run "stock". They need new valves, (the stock valves are junk and tend to come apart), they need machined for screw in studs and guideplates ... etc. Plus the oiling system needs some attention to make it live in the rpm range they like to run.

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madmanmike
Journeyman

Posts: 18
From: brenham,Texas,washington
Registered: Oct 2002

posted 11-03-2002 09:12 AM     Click Here to See the Profile for madmanmike   Click Here to Email madmanmike     Edit/Delete Message   Reply w/Quote
Well Ive had two motor combos. The first one was a street motor 830 anular carb torker intake mpg port plates.1970 model 4-v heads with just bowl blend they flow 300 at .5.6.7 and 197 at.5.6.7 on the ex. they have not been ported just bowl blended.at .4 lift on the intake they already flowed 265 ,how about that for low lift ? trw flat tops rings gapped .020 top ring and .018 second eagle rods 4 bolt block compression was 10.1 and I could run on pump gas 92 octane.I did run run race gas c-12 or c-16 depending on how much I sprayed. the cam was a chet herbert solid 555-565 lift 235-245 @ .050 110 lc a C-6 trams 3500 stall and 4.10 gears.1 7/8 headers with 3 inch exhaust with flowmasters 2 chambers. I had mickey thompson et street tires that measured 8.5 inches wide the best the car ran on the motor was 7.87 ant 89 mph
it ran cosistant 12.50 at 106 in the 1/4
i had bolt in sub frame conectors and southsise lift bars. I ran nitrous on the car for four years and stated with 100 shot, the car ran 7'teens 1.57 60 fts
went to 150 shot ran 6.90-6.80 1.54 60 ft 200 shot 6.70
250 shot 6.63 and a 1.48 60 ft was the best on 8.5 wide tires, all steel, all glass,all interior but the back seat, mufflers
the car was alot of fun to race on street nights the best part about the whole thing was I shifted the car at 6500 rpm and never hurt a thing. good machine work proper clearencs.and not getting gready. my new motor runs 7.20 on the motor and had a roller thats 650-650 lift
[email protected] .050 106 cl 12.2 copmression
tunnel ram c-6 with a 5000 stall the car has 9.9 wide et streets and the suspension is still the same it has run a 6.75 with 100 shot with a 3500 convertor.I went to a 5000 stall and didnt see any gain on the spray
Im making more power on the motor and using less nitrous to go as fast. since Ive swithced to a c-4 with the same 5000 stall and havent had a chance to race yet because ot the rain. I would say 6.90 -7.0 on the motor.the car weighs 3248 with me in it with the c-6 and figure 60 lbs lighter with the c-4.if you have any questions e-mail me at [email protected]

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