Went to the drag strip

[Blackbelt]

Took my 91 to Fontana 1/4 mile drag racing track 2 times in the last month. Best of 12.5 @ 113. Wondering if 4.10s will help me drop some time?

Also what's best some has gotten these things to 60ft on regular street tires? I was having a heck of a time trying to get this car to 60ft

[WARP TEN]

Originally Posted by Blackbelt

Took my 91 to Fontana 1/4 mile drag racing track 2 times in the last month. Best of 12.5 @ 113. Wondering if 4.10s will help me drop some time?

Also what's best some has gotten these things to 60ft on regular street tires? I was having a heck of a time trying to get this car to 60ft

There has been a lot of discussion about the question of 4.10s vs. 3.45s in drag racing. I would simply suggest that as a general matter, the slightly quicker acceleration of the 4.10s is probably more or less offset by the need to shift into fourth gear with them. With the 3.45s you can get through the 1/4 mile in third. But I loved the 4.10s on the street around town. BTW, 12.5/113 is a great time suggesting you have some performance modifications on your car. My '95 with Haibeck's 510 package and a 4.10 ran a 12.4/116 at Beech Bend with Marc driving it and no power shifting. When I drove it was slower. Below is a picture of me racing Marc's '93 then (photo courtesy of Gunny). Needless to say, he won.

As to 60 ft times, Marc always said the best way to get off the line quickly was to bog it a bit at first, launching around 1600-2000 rpm as I recall. I'm sure there will be other sound opinions on that here as well.--Bob

[Ccmano]

Originally Posted by WARP TEN

There has been a lot of discussion about the question of 4.10s vs. 3.45s in drag racing. I would simply suggest that as a general matter, the slightly quicker acceleration of the 4.10s is probably more or less offset by the need to shift into fourth gear with them. With the 3.45s you can get through the 1/4 mile in third. But I loved the 4.10s on the street around town. BTW, 12.5/113 is a great time suggesting you have some performance modifications on your car. My '95 with Haibeck's 510 package and a 4.10 ran a 12.4/116 at Beech Bend with Marc driving it and no power shifting. When I drove it was slower. Below is a picture of me racing Marc's '93 then (photo courtesy of Gunny). Needless to say, he won.

As to 60 ft times, Marc always said the best way to get off the line quickly was to bog it a bit at first, launching around 1600-2000 rpm as I recall. I'm sure there will be other sound opinions on that here as well.--Bob

Bob, Reading many of your recent posts, I’m starting to get the impression you are really pinning to get back into a ZR-1. C7 Z06’s like yours are amazing cars as are the 2 C6 Z51’s I’ve had since my first ZR-1. They just seem to lack the soul that the ZR-1 has. One of those things that’s hard to quantify. Do you think you will ever do it?
H

[Bob Eyres]

Blackbelt- I'd say you were doing pretty good. Others may differ, but I think at least 4.10 gears is the way to go in the 1/4 mi. (and on the street).
Your thinking on drag radials, gears, light flywheel is correct. It will give you at least half a second in the quarter with the mods you already have.
The thinking that you can "cut a better time using stock gears, and only use three gears in the quarter" is incorrect. Did you ever see or hear of a drag racer with a four speed put a lower numerical rear gear in, so that he only had to shift twice at the drag strip to "save time". That's silly.

Dissect your best numbers. #1 - You've cut a 2.0 60ft. on street tires, so you know how to drive. #2 - Your car will trap at 116mph, which means it has around 425hp. at the crank. #3 - Your best run of 12.50 with street tires and stock gears tells me that with the above equipment, and practice to put these numbers together you're in the elevens.

Your porting is ok, but the heads are where the power is. (witness Haibeck's 510hp- 350c.i. cars and Pete "the Greek", banging on the tens with a stock block 350 c.i. car.) It's the way this puppy breathes.

I've never cut an eleven second time, and that's mostly because my engine is stock, no porting, only bolt-ons (see below).

Good Luck, and wait for a cool night. They love the cold air.

[Paul Workman]

Originally Posted by Bob Eyres

Blackbelt- I'd say you were doing pretty good. Others may differ, but I think at least 4.10 gears is the way to go in the 1/4 mi. (and on the street).
Your thinking on drag radials, gears, light flywheel is correct. It will give you at least half a second in the quarter with the mods you already have.
The thinking that you can "cut a better time using stock gears, and only use three gears in the quarter" is incorrect. Did you ever see or hear of a drag racer with a four speed put a lower numerical rear gear in, so that he only had to shift twice at the drag strip to "save time". That's silly.

Dissect your best numbers. #1 - You've cut a 2.0 60ft. on street tires, so you know how to drive. #2 - Your car will trap at 116mph, which means it has around 425hp. at the crank. #3 - Your best run of 12.50 with street tires and stock gears tells me that with the above equipment, and practice to put these numbers together you're in the elevens.

Your porting is ok, but the heads are where the power is. (witness Haibeck's 510hp- 350c.i. cars and Pete "the Greek", banging on the tens with a stock block 350 c.i. car.) It's the way this puppy breathes.

I've never cut an eleven second time, and that's mostly because my engine is stock, no porting, only bolt-ons (see below).

Good Luck, and wait for a cool night. They love the cold air.

Agreeing w/ you Bob, from personal one-on-one experience drag racing YOU!

Or motors were comparable; both in the "510" range, but you had pulled about 2 car lengths @ the quarter. BUT! That said, you were loosing ground quickly in the second 1/4 mile (WANNAGOFAST) 1/2 mi. run.

I ended the 1/2 mile at ~144.25 (IIRC) in 4th gear, and you crossed the 1/2 mile at 138.xx as I recall. (However, you did had enough lead to finish ahead of me at the half mile mark.

I concluded from that, that beyond 1/4 mile the taller gears take over. And, Pete's numbers seemed to agree.

Ami's car has 4.10s and cams. There's no doubt it rips around the highways and byways with more authority. But, I always feel I need to be shifting (again, and again) or else constantly winding it out.

I'm not as hot to trot for 410s as I once was. But, maybe 373s or 390s???

[WARP TEN]

Originally Posted by Ccmano

Bob, Reading many of your recent posts, I’m starting to get the impression you are really pinning to get back into a ZR-1. C7 Z06’s like yours are amazing cars as are the 2 C6 Z51’s I’ve had since my first ZR-1. They just seem to lack the soul that the ZR-1 has. One of those things that’s hard to quantify. Do you think you will ever do it?
H

Hans, you are right that the ZR-1 has soul, and I do miss them. Every time I go to a Corvette show I think about the ZR-1. My new Z06 is beautiful, very fast (GM's numbers say 0-60 in 2.95 seconds), a great car to drive on long trips or around town and the technology improvement over our '80s-based technology is enjoyable. But the '95 was very special, one of the last built in the last year of production, and quite rare--with attrition, probably one of only 400 or so '95 ZR-1s left in the world. There was rarely another one at the shows. And it really had the best looking engine I have ever owned in an American car. I often won best in class trophies. So yes, I do miss the car in many ways. Unfortunately, at this stage in my life I have only enough room for one toy car in my garage--and not much of that, as it is a two car garage with a lift. In my dreams...Bob

[rush91]

Originally Posted by WARP TEN

Every time I go to a Corvette show I think about the ZR-1. My new Z06 is beautiful, very fast (GM's numbers say 0-60 in 2.95 seconds), a great car to drive on long trips or around town and the technology improvement over our '80s-based technology is enjoyable. But the '95 was very special, one of the last built in the last year of production, and quite rare--with attrition, probably one of only 400 or so '95 ZR-1s left in the world. There was rarely another one at the shows. And it really had the best looking engine I have ever owned in an American car. I often won best in class trophies. So yes, I do miss the car in many ways. Unfortunately, at this stage in my life I have only enough room for one toy car in my garage--and not much of that, as it is a two car garage with a lift. In my dreams...Bob

All you have to do is sell one of those BMWs lol.....then it's a 2 Corvette garage! I never see any Z's in my area, and I love it

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[WARP TEN]

Originally Posted by rush91

All you have to do is sell one of those BMWs lol.....then it's a 2 Corvette garage! I never see any Z's in my area, and I love it

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Sorry, can't sell mine--Corvettes don't do too well in a foot of snow. If I sold my wife's there probably would be more room as I would very quickly find myself single. But with lots of extra expenses. --Bob

[Blackbelt]

Thanks Bob. I am happy with the performance of it. I'm thinking 4.10s, aluminum flywheel and some drag radials and I can get at least some 12.3s out of her if not a little more. One of the runs I trapped 116 but it was slower run.

Car has porting, headers, exhaust and chip. Would love to get heads ported one day. For what it is it runs really strong.

Best 60 foot I could get was 2.0 I really think street drag radial would allow me to better that and get faster runs as she sits. I'll try soon.

[jss06c6]

My experience in my 2006 Z-51 was that MT Drag Radials took almost a second off my 1/4 mile time. Best I could do putting 428 HP to the pavement on street tires was 12.85 at 117. Could never get below 1.95 60 foot time. Changed to MT's and immediately ran a 12.02 123 and 1.72 60 foot. Ran 17 lbs in the MT's. Six speed manual.

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