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View Full Version : new pump on LB7

MattZ71
06-03-2009, 01:07 PM
i had a brain fart and cant remember, will a LLY or LBZ CP3 be a direct bolt up on a LB7???
trentnell
06-03-2009, 02:30 PM
yes , buy the lly flows the same as the lb7 , the lbz/lmm's flow the best . need some tuning changes for the later years to idle right though but thats all i think .
Dmax15
06-03-2009, 04:03 PM
Yeah I've got an LBZ pump on mine, fits the same. Had to make some simple changes to get it to idle right for the regulator, if you use an LB7 regulator then you'll be fine without having to make tuning changes.
MattZ71
06-03-2009, 04:32 PM
if ur using the lbz pump on a lb7, would it better to use the lb7 regulator or lbz's?
Dmax15
06-03-2009, 05:54 PM
I think it will work fine either way but if you have efi live then I'd tune the LBZ regulator to work and use it since it flows more. If you don't have efi live then go with the LB7 regulator and it'll idle like stock and work just fine on the LBZ pump.
S Phinney
06-03-2009, 09:52 PM
LBZ pump works great there are minor changes to do to the current for pressure. If you go that way I can pm you the values if you like. I got my LBZ pump cheaper from GM than I could get another LB7 pump.
rgullett83
06-04-2009, 12:34 AM
LBZ pump works great there are minor changes to do to the current for pressure. If you go that way I can pm you the values if you like. I got my LBZ pump cheaper from GM than I could get another LB7 pump.
x2
neversatisfied
06-04-2009, 12:54 AM
IIRC the only external difference between the pumps is the plug on the regulator is angled.
Dmax15
06-04-2009, 02:16 AM
IIRC the only external difference between the pumps is the plug on the regulator is angled.

Thats the only difference I could make out.

Tuning it was pretty easy to figure out.
MattZ71
06-04-2009, 02:33 AM
Thats the only difference I could make out.

Tuning it was pretty easy to figure out.

what tuning is involved?
OTHRGRL
06-04-2009, 09:34 AM
what tuning is involved?

LBZ pump works great there are minor changes to do to the current for pressure. If you go that way I can pm you the values if you like. I got my LBZ pump cheaper from GM than I could get another LB7 pump.

Shane already answered that and has you covered if you need help.
Dmax15
06-04-2009, 12:19 PM
what tuning is involved?


The first 3 cells in table b1010 need to be bumped up by 50 or maybe slightly more. I bumped mine up 55 or 60 I think to get it to idle like stock. I can send you the table as well if needed.
MattZ71
06-04-2009, 09:27 PM
The first 3 cells in table b1010 need to be bumped up by 50 or maybe slightly more. I bumped mine up 55 or 60 I think to get it to idle like stock. I can send you the table as well if needed.

yes, if you dont mind to send me the table, ill be puttin the lbz pump on a lb7 next week, i owe you big time!!!
Mike
06-04-2009, 09:36 PM
Bumping up the the number has an effect of closing the valve more. So numerically lower numbers open the valve respectively.
RickDLance
06-04-2009, 10:36 PM
yes, if you dont mind to send me the table, ill be puttin the lbz pump on a lb7 next week, i owe you big time!!!

Let me know how it works please. I'm thinking of doing it.
Dmax15
06-04-2009, 11:47 PM
Let me know how it works please. I'm thinking of doing it.

Sent both of you PM's
RickDLance
06-05-2009, 12:00 AM
Thanks!!
Mike
06-05-2009, 01:14 AM
what tuning is involved?

Here is a little help.

http://www.dmaxcentral.com/forum/showthread.php?t=2070