Paul Bell

iTrader: (9)

I’m new to the LS1 scene as I’ve stepped up from the 94 LT1 to a 99.
I’ve studied as many threads as I can and did a lot of searching and have found good info.

There’s a few things I can’t find answers for:

1st: Eventually, I’ll be going long tubes with a catted Y-pipe. As I understand it, using Bosch 13111 O2 sensors for the rears will be needed as their bigger heaters help. Can I also use these 13111 sensors for the fronts?

2nd: Will an LS2/3 water pump bolt onto a LS1 block without modifications to either?

I’m sure I’ll have more questions as I go along...

Thanks!

RevGTO

iTrader: (12)

You can use Bosch 13111's for the front. A lot of guys have with mixed results. Personally, I'd stay with the stockers unless you have problems with them. The evidence is that the aftermarket ones don't work much better.

Delete your rear O2's and have the code tuned out. You won't need them with LT's.

On the waterpump, check with a GM dealer. IIRC, they offer the LS2 style for LS1's, but it requires some modification to work?

c0ncEpT

iTrader: (4)

Yes you can. I have had them on my car for 20K miles and they work flawlessly

5.slow99

to my knowledge i believe a stock LS2 water pump is the same partnumber as the ls1 water pump when searching at the local part stores so like posted above check with a dealer if your looking to go better as far as cooling goes.

Paul Bell

iTrader: (9)

Thanks guys. I've discovered that Meziere lists their EWP's for LS1 through LS8 enigines, so it'll fit. LS8??

Good to know on the O2's.