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View Full Version : Cam change on a LS7 motor.



SG57
23-08-13, 08:49 PM
http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_5217c69f5159d.jpg
This is a new crate LS7 with a factory rated 505HP, the word is that with an upgrade to the cam and a tube exhaust 600HP is attainable....so here goes... this shot is with the waterpump and front cover removed.

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_5217c6a5e759b.jpg
The LS7 is dry sumped but with a two stage internal oil pump. th pump needs to be pulled off the crank to change the cam, here it is nearly off.

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_5217c6ab1ced5.jpg

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_5217c6b6a1927.jpg
Pics show the start of the fuel rail/injector/inlet manifold removal and the name plate of the engine builder.

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_5217c6cde2638.jpg

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_5217c6c7556e1.jpg

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_5217c6bd8d2ad.jpg

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_5217c6d2e40b7.jpg

I took the manifold and valley plate off to check that the roller followers were OK but I could have saved the effort it's not like an 'old' small block and you can't see them!

SG57
23-08-13, 09:00 PM
http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_5217c6dbca9d8.jpg
As I said you can see nothing!

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_5217c6e4848f5.jpg
Great induction ports.

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_5217c6ef1ca08.jpg

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_5217c6f7511e8.jpg
Factory cam and cam sprocket together with factory crank sprocket removed.

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_5217c7005d08e.jpg
Factory cam (top) looks much better that the after market cam!

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_5217c7074c64e.jpg

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_5217c711eea16.jpg
New cam installed (note adjustable dowel set on zero) and internal oil pump slid on to crank and bolted up.

Rog.

SG57
23-08-13, 09:11 PM
http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_5217c72ec3120.jpg
All gaskets are like this and brilliant, an ally plate with a formed bead of silicone on each side.

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_5217c72818532.jpg
Induction and fuel system back on.

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_5217c7370d5e2.jpg

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_5217c73e1fcee.jpg
Tightening the front pulley and then torquing it in two stages, the front cover is left loose while this is done to aid the centralising of the front pulley/oil seal.


http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_5217c7486ffa7.jpg
cam position sensor replaced.

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_5217c75f08e91.jpg

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_5217c75043cfb.jpg

The completed engine waiting for a Quaife paddle shift 6 speed gearbox and then fitting into the car. We will try to get an ECU that will control the engine and gearbox as a unit, does anybody know of a good computer man!!!!!!

Rog.

cptpugwash
23-08-13, 09:38 PM
some great pics there
what car is it going in

SG57
23-08-13, 09:47 PM
TVR Tuscan, for track days only.

Rog.

cptpugwash
23-08-13, 09:57 PM
oooooooooo you gotta put some pics of that up,always thought the tvr's a cracking looking car,cept the wedge shaped one
be interesting to see how it goes n if that cams made any differance

keep the updates coming :tup:

SG57
23-08-13, 10:17 PM
There is a TVR Sagaris circuit racing with this set up and is very successful
http://www.youtube.com/watch?v=EIC7wC1ipVk (the sequential shifter looks cool shifting on it;s own). The gearbox should be here in a few days and then it's shoehorn time although it had a 427 'old style' small block in it before so the chassis has already been widened a little.

Rog.

cptpugwash
23-08-13, 10:52 PM
sounds like awsome fun
looking forward to following the progress and the cars first run out :)

are you going to engrave on the engine builders name plate *and tuned by sg57* :)

SG57
24-08-13, 08:15 AM
sounds like awsome fun
looking forward to following the progress and the cars first run out :)

are you going to engrave on the engine builders name plate *and tuned by sg57* :)

I prefer to be anonymous, It's never been started yet so if it's good I'll take the credit and if it's not it's his!

I should add that these engines are available in the UK in stock from http://www.partsworldperformance.com/ 7 Litre ally small block 505HP for 8800 although to run it you need an ECU/throttle pedal which cost around 700 and are in stock. I'm not anything to do with them but the engine costs exactly the same here as in the US (at the current rate of exchange) and they keep them all in stock from LS1 to the supercharged LS9 so they deserve to do well.

Rog.

Plumpcars
24-08-13, 08:16 PM
That was a really interesting post Roger. A member on here has put together(With help from other friends) an LS powered '57. They are a very impressive engine. I'd also love to see this updated.

SG57
24-08-13, 10:37 PM
That was a really interesting post Roger. A member on here has put together(With help from other friends) an LS powered '57. They are a very impressive engine. I'd also love to see this updated.
I will be updating it Steve, when we picked up the engine the first view was of the back of the block and I said " That would bolt straight into a '55" and as I got into the engine I found out that there are side mounts that you can bolt on to this series of engine which would make it a bolt in for the '58 onwards side mounts.

Rog.

JB Chevy
08-09-13, 07:52 AM
Rog cheers for posting that qualifying in the TVR vid, nice bit of calm collected driving by Mr Hood :D liked the smooth power on wheel spin and quality sound of the engine revs nicely rising. Listened to that 5 times already.

John

SG57
18-03-14, 07:03 PM
Sorry about the delay with the follow up, the guys have been busy on other cars. The Quaife sequential transmission is ready, the LS7 has been on the dyno and the ecu has been made to integrate the engine and gearbox, so no more down shifts at a gazillion revs! The headers have been made by Jon Webster in stainless with flanges made by Whengparts. Two companies that I can't speak too highly of. The trans has a compressor for the paddle shifted air cylinder, almost like a drag car!

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_532897a9da991.jpg

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_532897b3e6b88.jpg

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_532897c37a76f.jpg

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_532897cf65fc6.jpg

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_532897d875142.jpg

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_532898008829d.jpg

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_532897f611127.jpg

http://www.torquedup.co.uk/forum/imagehosting/usr_images/3/3_532897e85062d.jpg

Rog.

cptpugwash
18-03-14, 10:39 PM
exhaust looks really good
how much power did you get on the dyno

SG57
18-03-14, 11:26 PM
exhaust looks really good
how much power did you get on the dyno

Captain I was dreading somebody asking that, I don't know! I've not seen the dyno sheets, because I had done the cam change myself I was happy to hear that it ran perfectly with no leaks. I'll have a look and come back to you.

Rog.

cptpugwash
19-03-14, 11:22 PM
pretty sure itll be good :tup:
have faith in yeah :)

cptpugwash
10-05-14, 06:39 PM
any news

cptpugwash
21-05-14, 09:44 AM
Captain I was dreading somebody asking that, I don't know! I've not seen the dyno sheets, because I had done the cam change myself I was happy to hear that it ran perfectly with no leaks. I'll have a look and come back to you.

Rog.

bump :)