General LSX Automobile Discussion - Newbie - Couple of questions...

Hi,
We are new to the forum (based in the U.K.) & have a couple of (hopefully) basic questions.

We have a LS1 motor in an off road single seat racer. The engine was bought second hand, so we are unsure what vehicle, year etc it came from.

So question 1 - Where is the engine number located & will it give us the year (and any other info) that maybe usefull? For ordering parts etc.

2. What is a safe RPM limit on standard motor internals?

3. Is there an aftermarket rev limiter available to buy & Fit?
We are currently running an Edelbrock LS1 Timing Control module (made by MSD), using the 8 original coil packs & a Carburettor.

Thanks in advance

Hi,
We are new to the forum (based in the U.K.) & have a couple of (hopefully) basic questions.

We have a LS1 motor in an off road single seat racer. The engine was bought second hand, so we are unsure what vehicle, year etc it came from.

So question 1 - Where is the engine number located & will it give us the year (and any other info) that maybe usefull? For ordering parts etc.

2. What is a safe RPM limit on standard motor internals?

3. Is there an aftermarket rev limiter available to buy & Fit?
We are currently running an Edelbrock LS1 Timing Control module (made by MSD), using the 8 original coil packs & a Carburettor.

Thanks in advance

An LS1 is an LS1 as far as the basics go no matter the year it was made. If the part says it was made for an LS1 it will work on your motor. If you are curious though check the back of the driver's side cylinder bank and you should find the casting number.

Block Casting Number Engine Model Year Range
12550592 LS1 (5.7L/346ci) 1997
12559846 LS1 (5.7L/346ci) 1998
12559090 LS1 (5.7L/346ci) 1998
12562174 LS1 (5.7L/346ci) 1998
12559846 LS1 (5.7L/346ci) 1998
12560621 LS1 (5.7L/346ci) 1998
1240030 LS1 C5R (5.7L/346ci) C5R Racing Block
12559378 LS1 (5.7L/346ci) 1999-2000
12561168 LS1/LS6 (5.7L/346ci) 2001
12561166 LS1/LS6 (5.7L/346ci) 2001-2004
12568952 LS2 (6.0L/364ci) 2005
12560799 LS2 (6.0L/364ci) 2006-2007
12584724 LS3 (6.2L/376ci) 2008-Present
12598723 LS7 (7.0L/427ci) 2006-Present
12621766 LS9 (6.2L/376ci) 2009-Present
12569513 5.3L Aluminum 2005*
12551358 4.8L/5.3L Cast Iron 1999-2003*
12551364 6.0L Cast Iron 1999-2004
*Year Range Listed is for Known Years only.

Block Casting Number Engine Model Year Range
10212339 LS1 (5.7L/346ci) 1997-1998
12558805 LS1 (5.7L/346ci) 1997-1998
12559852 LS1 (5.7L/346ci) 1999-2001
12564241 LS1 (5.7L/346ci) 2001-2004
12564243 LS6 (5.7L/346ci) 2001-2005
12564243 LS2 (6.0L/364ci) 2005-2007
12600821 LS3 (6.2L/376ci) 2008-Present
12578452 LS7 (7.0L/427ci) 2006-Present
12621771 LS9 (6.2L/376ci) 2009-Present
12559862 LS1/LS6 (5.7L/346ci) 1999-2003*
12561706 4.8L/5.3L Cast Iron 2004*
12562317 4.8L/5.3L Cast Iron 2001-2006*
12572317 6.0L Cast Iron 2001-2006*
12572035 6.0L Cast Iron 2001-2006*

I probably wouldn't go much over 6K with stock internals.

Not really sure about a rev limited for a carb LS1. This might be what you are looking for but some more research may be in order.
http://www.summitracing.com/parts/MSD-6010/

or just check the top of the heads for the casting #

#806 = 97-98 corvette, 98 camaro
#853 = 99-2000 vette, 99-00 camaro
#241 = 01-04 corvette, 01-02 camaro
#243 = ls6 engine from z06 corvette or caddilac cts-v ls6

assuming your engine is untouched the head numbers or block numbers will be your best bet..

just post pics and everyone will chime in quickly

Thanks for the pointers I will take a look for the engine number during the weekend.




I probably wouldn't go much over 6K with stock internals.

http://www.summitracing.com/parts/MSD-6010/

Im hoping this is the only damage from a suspected over-rev moment.


http://img26.imageshack.us/img26/8420/img0068st.jpg (http://imageshack.us/photo/my-images/26/img0068st.jpg/)

Thanks for the pointers I will take a look for the engine number during the weekend.




Im hoping this is the only damage from a suspected over-rev moment.


http://img26.imageshack.us/img26/8420/img0068st.jpg (http://imageshack.us/photo/my-images/26/img0068st.jpg/)

I can't make out everything in the pic but if bent PRs are your only worry then you got off easy. I would suggest the trunion upgrade kit from com cams and maybe double hive springs if you haven't already with hardened rods.

Hi,
I am hoping that I have got off lightly too. The Pushrod is bent, the rocker arm appears to be in good order. I put petrol in the port to check if the valve was bent, but that stopped on the back of the valve & didnt run into the cylinder.
I cant physically check the hydraulic lifter without taking the head off, but a friend has a camera on a flexi stalk which we used to look at the lifter via the pushrod hole. It doesnt appear to have broken . Im just wondering if it has "jacked up".

Decadence75 are the casting numbers you posted the same for a corvette ls1 as for a camaro ls1?

fun times

Hi,
I am hoping that I have got off lightly too. The Pushrod is bent, the rocker arm appears to be in good order. I put petrol in the port to check if the valve was bent, but that stopped on the back of the valve & didnt run into the cylinder.
I cant physically check the hydraulic lifter without taking the head off, but a friend has a camera on a flexi stalk which we used to look at the lifter via the pushrod hole. It doesnt appear to have broken . Im just wondering if it has "jacked up".

I would think that you are only looking at a bent rod if the valves are in good shape. If it would have hit hard enough to break the lifter, you would probably have valve damage as well. But if you want to be positive then I would pull the head and inspect everything.

Decadence75 are the casting numbers you posted the same for a corvette ls1 as for a camaro ls1?

Yes, those casting numbers are for all LS1