neverstop

z51 gearbox sucks for sure. I raced a car that put down essentially identical whp on the same dyno as my car and he had zr1 gearset vs. my z51, but other than that cars were extremely similar and his zr1 gearset had him pull about 3-4 cars on my in the 1/2 mile mostly because of that horrific 5th gear. I forget the mph difference between his car and mine but it was more than I would have guessed.

Really tempted to just get some huge rear tires on 15"s and wind out 4th.

CI GS

Good to know about the Cadillac lifters. I swear I saw some vendor touting them as the best drop in high rpm lifters or some such ****.
I don't know if I'll mess with changing the heads on the stock bottom end, to be honest. More likely I'll just build a 416 at some point and be done with it. Haven't had a chance to try the new tensioner yet. Was out of the country since last Thursday, but just got back a couple of hours ago. Looks like my hood has been repainted, so, weather permitting, I'll give it a blast soon.
Oh, BTW, I've noticed that there are two types of "LS7 lifters", and one type is cheaper? Don't know WTF is up with that, but you might want to look into that a bit too.

schpenxel

I don't doubt it.. first is borderline useless and the jump from 4th to 5th is terrible, especially with centri setups. Might not matter as much on a TT setup or something where you can have full boost earlier. ZR1 ratios seem to work a lot better in these cars once they have a blower on them. I almost just started out in 2nd gear so I didn't waste time spinning around in first

I could be wrong... I just did some quick searching around for them, found some good and some bad, which could really mean about anything in this hobby

That 416 sounds fun. You going to put a bigger blower on it when you do that?

I'll have to look into LS7's a bit more then, I've noticed very different prices for them from different places and wasn't sure if it's just that some mark them up like crazy or if there's an actual difference

New hood should look good

Unreal

Ls3/7/etc lifters are all the same.

Caddy lifters are good in certain applications, but I wouldn't use them in yours. In a NA setup, they work fine. For something with a big cam or a blower, I would go with the Johnsons.

schpenxel

Good to know. Summit has a kit with lifters, trays and new bolts for $150 so I'll probably just do that. Johnson ones looks nice though

Unreal

BTR sells the stuff cheap too. I get all my stuff through him. Better to support him then summit.

Or BTR dealer.

schpenxel

Good point. If they're even in the ballpark I'd rather buy from them

rm386

Looks like you had some good fun Carson! I'm pissed I didn't go, but thought for sure that you guys were going to have rain delays. Next time..come borrow my rear wheel/tire setup so you can get some traction down low!

schpenxel

Honestly I almost didn't go.. I was falling asleep halfway there while driving in the pouring rain and figured there's no way it doesn't get rained out but somehow it didn't. Last year at the Virginia one it was the exact opposite.. totally clear/nice weather until I got up to the track then it was so foggy they literally had people on ATV's leading people around because no one could see

I think my 05 rear is cringing at the thought of some real sticky tires!

CI GS

I agree with Unreal. BTR are great people to deal with and he deserves all the support he gets.
BTW: it was his website that alerted me to the two types of LS7 lifters:
- "Delphi LS7" lifters are listed at $99.00, and;
- "Chevrolet Performance LS7" lifters are listed at 185.95.
There must be some difference, and it could simply be quality control, because I've seen pics on here of some new LS7 lifters that appeared to have been run over by a bulldozer, with nicks on the rollers, etc. I'll bet the Summit kit has the cheaper variant.
I would go with the higher priced ones, which are still a good deal, IMV.

CI GS

BTW: One of the best options out there for the high power M6 guys that want a something like a sequential box, without the $25,000++ sequential price, must be the Pfitzner trans conversion, for a mere $9,995.95:
http://www.mtiracing.com/pfitzner-pp...road-race.html
I haven't come across anyone on here with one though, although I haven't really been looking for it, to be honest.

CI GS

Carson you need a forged 402, one of those Pfitzner dog-box conversions, and a Z06 diff. That's all.
Just skip the dentist, sell the Caddy and buy a Prius (so that you won't be tempted to work in it), and start marketing yourself as a World Class tuner (which you are, BTW), and you'll have the capital in no time!

schpenxel

I can always raid the retirement fund ! Just kidding of course. If I did a 402 then I'd have to go to a larger blower, then larger injectors, then probably more fuel system, probably a different cam, oh and then a secondary drive setup and a new balancer... I don't even want to know what all that would cost.

I think if I did anything I'd do an iron block truck motor and a YSI and spin it till it blows apart then buy another one. They survive amazingly well with the ring gap opened up, good head gaskets/studs and good fuel.

I was going to maybe buy Unreal's T56 but he sold it already. Guess I should have bought it like a year ago when he offered

Yeah it looks like those Summit ones are pretty much the cheapest of the cheap, which I mean is likely fine but I've found some stories of them not lasting long too. I'll probably just give BTR a call and do what they tell me to do. I think I'd be crazy not to change them while I have the heads off

I do appreciate it, I just need to spend more time getting paid to tune. The day job is going shitty at the moment so I've been thinking about it more lately, at least as an option if I had to.. never know.

Unreal

IMO, if you did do a 402, it would just be for more low end torque before blower comes on. Anything past a novi 1500 on a street driven c6 is useless and just hurts the car IMO.

Don't fall for the trap of making your car a race car. It sucks and gets expensive fast. Fix what is wrong (LSA heads/studs/etc) and enjoy. Your at a great level now.

schpenxel

Yeah I'm staying away from race car territory. It is easy to get sucked in after having fun at an event like that but I know it's not a good idea. Even with the head gasket issue it was a really good time

Just going to fix current issues and keep on with what I've got. At most I may do something about factory Z51 gearing to try to get some improvements from that. I think I can pick up a few mph from that

I should probably get the thing on a dyno at some point. It's still never been on one

Unreal

I almost fall for that after every race event. Went 189 mph last 1/2 mile, want that extra 1mph. Started thinking seats, intake, etc etc. Then drove car for a month and realized who cares. I do 3 maybe 4 events a year. Why dump thousands more for 3-4 days a year. Car drives great, works great, and I'm enjoying driving it around town and on errands. No need more more power. If anything I'm thinking of upgrading speakers/stereo/etc and would do seats for comfort.

Plus wife convinced me we needed to remodel the master bathroom. So there went $25k.

schpenxel

It's easy to do.. I was just glad I out MPH'd the lambo an old friend brought

Wife's and their bathrooms..

I saw the pics on Facebook the other day, should be a nice improvement

neverstop

on street tires I typically mph better launching from 2nd gear

schpenxel

Think I'll try that at the next one. Elevation is way up there at the Virginia one in July so I expect speeds will be down some

CI GS

Just add some nitrous to offset the elevation...