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#21
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After seeing your dyno numbers, it may surprise you how fast your car will go eventually. Here are 2 slips note the years,60fts,1/8th mile et and mph and 1/4 mile et and mph. Both slips are from the same engine configuration 290 SD KRE heads, OF cam, 1.65 rockers, torker 2, 950 HP Holley, 1 3/4 inch Hooker headers 3 inch front x pipe..
Slip on left 3.08 geared 3710 lbs car..slip on right 3.42 gears 3900 lbs. Shows how much is left in your engine.
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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2 373 gears 3200 Continental Convertor best et 10.679/127.5/1.533 60ft 308 gears best et 10.76/125.64/1.5471 Last edited by ta man; 07-06-2020 at 08:50 PM. |
#22
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I would be very happy with an 11.9. No need to be greedy lol
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1967 Firebird 462 580hp/590ftlbs 1962 Pontiac Catalina Safari Swapped in Turd of an Olds 455 Owner/Creator Catfish Motorsports https://www.youtube.com/@CatfishMotorsports Last edited by RocktimusPryme; 07-06-2020 at 10:25 PM. |
#23
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LOL that'll be next. Once you scale it the bug will start and you'll be looking for ways to remove some weight
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#24
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I’m reaallly bad about getting things running well and then never finishing extraneous details. I always have too many projects to do everything I really should to any one of them. I need to paint and sell my 43 MB So I have one less thing to mess with.
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1967 Firebird 462 580hp/590ftlbs 1962 Pontiac Catalina Safari Swapped in Turd of an Olds 455 Owner/Creator Catfish Motorsports https://www.youtube.com/@CatfishMotorsports |
#25
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Stan
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Stan Weiss/World Wide Enterprises Offering Performance Software Since 1987 http://www.magneticlynx.com/carfor/carfor.htm David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software http://www.magneticlynx.com/DV Download FREE 14 Trial IOP / Flow Software http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php Pontiac Pump Gas List http://www.magneticlynx.com/carfor/pont_gas.htm Using PMD Block and Heads List http://www.magneticlynx.com/carfor/pont_pmd.htm |
#26
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Running quick at the track is ALL about you well the car hooks and how hard it leaves. Efforts put into suspension and tires will get the car where you want to be more than work in other areas.
Way back when I first started getting serious about getting the Ventura into the 11's I spent a lot of time with the suspension system. I started by installing sub frame connectors (boxed and welded in place), then moved on to springs, spring clamps, adjustable pinion snubber, welding the tubes into the carrier, and drag shocks. I'm NOT a fan of traction bars for leaf spring cars, I don't like the look of them hanging under the car and can't stand the "clunking" you get with them for street driving. Plus I'm more into the "stock" lock and ride height, plus using stock rims tucked up nicely under the car. When folks start gendering at your car after you make a hard run without any visible traction devices and stock ride height it just puts a perplexed look on their faces. The looks get even more perplexed when they take a gander under the hood and see the Q-jet sitting on a stock intake. Anyhow, even with 3.08 gears you should be able to run quick in 60' times, so put some efforts there. I would think you could bust into the 1.6 second range with some effort as there is certainly enough power and converter there to do it. That'll knock a bunch of ET off the time slips. I still remember my very first outings with the old 455 making apprx 1hp/CID. I was all over the 1.9-2.0 range with 60' times and barely dipping into the 12's in the 1/4 mile. I ended up getting the car solidly into the 1.67-1.69 range without doing anything to the engine. It took some work but I ended up running 12.0's at 112mph when the smoke cleared and the dust settled from those efforts. I would have busted right on into the 11's with that combo but KRE developed their new aluminum heads and I was asked to test them so went that direction and never looked back........Cliff
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
#27
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Looking back, knowing a little more now than I did then, that's one big regret I have. Skimping on oiling. So maybe that's a winter project. Pull it out for a day and put a better pan on. The only reason I haven't added an MSD box is Im using a now defunct Accel Billet distributor. Which works great, but the directions for adding a CD box didn't make sense. The directions with the accel unit seemed to denote some wire colors that didn't match. Im sure I can figure it out, need to just bite the bullet and buy one. Cliff I know I can add some effort in the suspension. Which it should be noted hasn't been completely ignored. I don't have a ton of clapped out 50 year old components. The springs all the way around are new, if stock replacement type units. I did ditch the mono leafs for multi in the rear. The front springs are the ones Moog labled as the HD springs that came in RA II cars. The wheels are now lightweight Race Star Darkstars. MT Et Street SSs in the back. 275/50s to keep the height down with the highway gear. The front shocks are nice Bilsteins. The rears are cheapy KYBs. That is one place Ill probably put in adjustable drag shocks in the back. I have bolt in subframe connectors, but I think Im going to weld them in the front. Added a couple clamps on the rear leafs. I did put some tack welds on the axle tubes too. Not the prettiest but they are there. Ive had more practice and am a little better with the mig gun now. My frist priorities are probably in the safety dept. I need to get a CD box for the rev limit function, and I need to upgrade that rear U joint to a 1350.
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1967 Firebird 462 580hp/590ftlbs 1962 Pontiac Catalina Safari Swapped in Turd of an Olds 455 Owner/Creator Catfish Motorsports https://www.youtube.com/@CatfishMotorsports |
#28
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You are making more power and certainly lighter than I am. See sig....
As others mention, get those 60’s DOWN! The DA doesn’t look like it was helping you.... Keep at it, the et’s should fall quickly
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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile |
#29
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Have a driveshaft loop? I'd do this first. If you are running slicks it pretty much a must have. I've shaved almost a full second off my ET's by working on suspension and learning how to drive. I used to think it was all about the engine but if you are already making good power tuning isnt going to yield significant gains.
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************************************* 1968 Lemans. 37,000 original miles. GTO clone. 462ci/KRE 290 heads. UltraDyne 280/288 Solid/850 Qjet by Cliff/Performer RPM/TSP 9.5" in TH400/8.5" 3.42 gears/3950# Race weight/12.58@106 at Bandimere speedway high altitude |
#30
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Its got a safety loop, subframe connectors, all the fuel or transmission soft lines are NHRA approved stuff. It is still C clips, but it has rear discs so that's kinda poor mans safety device in back. When I said "upgrades in the safety dept" I mostly meant things to keep the car safe. Like a rev limiter. Its got a really nice converter in it, but the th400 itself was bought used off here. Supposed to be built, but you know how that goes. So I don't fully trust the trans itself.
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1967 Firebird 462 580hp/590ftlbs 1962 Pontiac Catalina Safari Swapped in Turd of an Olds 455 Owner/Creator Catfish Motorsports https://www.youtube.com/@CatfishMotorsports |
#31
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************************************* 1968 Lemans. 37,000 original miles. GTO clone. 462ci/KRE 290 heads. UltraDyne 280/288 Solid/850 Qjet by Cliff/Performer RPM/TSP 9.5" in TH400/8.5" 3.42 gears/3950# Race weight/12.58@106 at Bandimere speedway high altitude |
#32
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Im fine if I never hit the limiter, but just to know that a $30 joint failure wont cost me a $10,000 motor.
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1967 Firebird 462 580hp/590ftlbs 1962 Pontiac Catalina Safari Swapped in Turd of an Olds 455 Owner/Creator Catfish Motorsports https://www.youtube.com/@CatfishMotorsports |
#33
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Limiter is always a good idea. Cheap insurance on an expensive engine.
Can't tell you how many times I've hit the limiter over the years, and the last couple years dad can't seem to stay off of it. Also can't tell you how many times I wish I had a limiter on some of the cars, LOL Here's an example of why a limiter is a good idea. This could have been a $20,000+ engine down the tube without a limiter. https://youtu.be/eAEtmyINan4 Last edited by Formulajones; 07-10-2020 at 04:09 PM. |
#34
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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2 373 gears 3200 Continental Convertor best et 10.679/127.5/1.533 60ft 308 gears best et 10.76/125.64/1.5471 |
#35
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On that pass I linked he was having converter issues and it was just blowing through the converter giving him the sensation the trans wasn't shifting (shift light never goes out). RPM's weren't changing. He was on a good pass there, with a 1.48 60 foot still not coming out 100%, but after this pass something in the converter wasn't right and it started clunking. Had to send it back for a restall anyway, and they ended up building a new converter from scratch. New one seems much better but still waiting for a track day. It's things like this that you don't expect, and the rev limiter saved the day. Last edited by Formulajones; 07-11-2020 at 10:16 AM. |
#36
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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2 373 gears 3200 Continental Convertor best et 10.679/127.5/1.533 60ft 308 gears best et 10.76/125.64/1.5471 |
#37
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That or breaking a rear, that will buzz the whole drive train. |
#38
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Ouch!
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#39
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Which is my concern. I think I’m going to go with the stand alone pertronix rev limiter rather than a CD box. Seems easier to unhook if the box goes bad. So many people talk about getting stranded if the MSD box dies on your.
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1967 Firebird 462 580hp/590ftlbs 1962 Pontiac Catalina Safari Swapped in Turd of an Olds 455 Owner/Creator Catfish Motorsports https://www.youtube.com/@CatfishMotorsports |
#40
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The stand alone rev limiters like the Pertronix, or Crane, are pretty rough. It'll do what you're looking for as far as saving the engine, but boy when you hit the rev limiter on those things it feels like the engine is come apart, lol. It's nothing like the soft touch rev control of a CD box that moves random cylinders around. Plus those little control units have left me stranded more than once so I tend to not trust them. |
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