ls1 1990 VN

I'm in the process of ordering from TSP, Cadillac Racing Team Lifters.

Just been told to research these as non of you guys are using these anymore.

WHY?

Unertl42

iTrader: (63)

most guys just run the LS7 lifters, since they're cheaper, and most guys don't have their rpms go past 6500.

ramairws6

iTrader: (33)

I run this lifter in my 441 and yet to have any issues. I have heard a handfull of people having issues with these things and if i had a chance to do it again i would not have used them. I wanted the best of everything at the time and they were supposed to be just that. Come to find out if you compare the LS7 lifter to the Caddy lifter there is a comparable physical difference favoring the stock LS7.

ls1 1990 VN

I was told here in NZ by my tuner to use these, my engine will not rev past 6000rpm, with the cam i'm using it should go to 6500rpm. My tuner has said it's the lifters 'my comp lifters' that is causing this....

vettenuts

iTrader: (4)

If the tuner saying to switch for a weight issue?

The lifters are on the slow side of the valve train. If you have issues with the valve train I would look at other things first. Prime example, the Morel is much heavier then the LS7 and they have no issues with high RPM.

WKMCD

iTrader: (2)

I ran the Caddy lifters for a while until a couple got noisy. I replaced them with Morel link bar lifters.

ls1 1990 VN

I'm not to sure what his reason is, the comp lifters i've always used & with my first cam revved to 7000rpm.
When this smaller cam is being tuned it goes to 6000rpm then the power just drops off, cam is meant to go to 6500rpm, His fix is to fit the Caddy lifters

JimMueller

iTrader: (9)

If the powers dropping off a cliff, maybe it's a valve float problem? Valvespring pressure OK? Shimmed within .050 of coil bind? What are the spec's of the old vs new cam?

vettenuts

iTrader: (4)

That's what I was thinking. The lifters won't address a valve train issue. Do you have the dyno curve? What are the valve springs being used?

Gregory

iTrader: (4)

I use the Cadillac racing lifters to 7,000+ RPM without issue. They are noisy like solid lifters.

ls1 1990 VN

Old cam was a TSP 231/237 new cam 222/222

Valve springs are P/Gold

Can't post up my old Dyno sheet but torque & hp reach 6000rpm then both drop off
HP is still climbing at 6000rpm, Torque peaks at 4800, slowly drops then rises a bit at 5400 then falls away till 6000 then just drops

vettenuts

iTrader: (4)

Pull the Patriot springs and test them. They are known to lose their stiffness very quickly. I have seen several tests on these springs after low miles and the results were poor. If they did lose their stiffness, this would explain the sudden drop in power at high RPM.

ls1 1990 VN

This has been like this since the new cam install, infact the engine had a full forged rebuild along with new Patriot Gold springs, The TSP 5.3 2.5 heads were shaved 0.30 to increase CR

ramairws6

iTrader: (33)

Ya, i hardly believe the Patriot springs are the issue. I've had mine on for about 5,000 miles and tested them and they were within 1 % from new.

ls1 1990 VN

My original set were checked after replacement and found to be as good as.

Replacements parts for my broken timing chain repair are now on there way here, Caddy lifters included, will see in a few weeks if the problem is sorted.
I have also gone with the fast 102 intake & a 95mm PTM tb

ramairws6

iTrader: (33)

Any update on this? How do you like the Caddy lifters??

ls1 1990 VN

Man have i had issues.
I purchased a Fast 102 intake & 95PTM T/B from TSP, when it was installed here the T/B didn't fit due to LS1 water pump & T/B not sealing to the intake, TSP replaced the T/B with a PTM 102 & i bought a LS2 water pump from TSP.
The pump arrived without the thermostat & housing, 'great', so buy them from TSP, now today, 2 weeks later through usps the thermostat & housing finally arrive, 10 days later than should be.
Guess what!!! the wrong f--kn parts..they are the same as what i have, LS1, they are meant to be for the new LS2 pump...boy am i pissed!
The workshops spewing at me as they want the car gone from their shop, it's been there since July 26th.
I've missed my last road race meeting where i was leading the series, 3 reasonably big car displays i would normally attend, another this weekend & no doubt a drag day coming up on the 21st Nov.

slt200mph

iTrader: (42)

You should be able to grind the top of the water pump down to clear the TB. There was a post about this subject on here a few days ago.

ramairws6

iTrader: (33)

Ya, i was one of them that made this post. I did a Fast 102 swap on my budds LS1 and it was a PITA! I ended up changing a bolt out on the waterpump cover and grinding a little off the top.

ls1 1990 VN

That was done on mine also, but it still didn't clear due to my heads being milled .030. & the T/B cable 1/2 wheel also fouled on the pump due to the temp senser being in the way.
I have used an LS2 water pump that doesn't have the vertical housing protrusion next to the intake pipe but does have the same front cone shaped pulley.
The workshop has found the right Thermostat & housing, thank christ, so now need TSP to exchange the LS1 unit they wrongly supplied for the right one so it can be given back to the guy that gave his to my car.