RSX302 Future--Engine Poll...

[93Polo]

What's the difference with the stock LS6 block sleeves vs any of the others?

I'm finding that all the stock LS blocks are capable of holding high hp, but at the cost of sleeve expansion and blowby.

I'm also catching the hint with the stock heads. I'm thinking AFR,Allpro...etc will be necessary.

Since the Ford is 10 bolt, I'm use to the sealing issue..My 302 uses 1/2" studs, Cometic MLS gasket and Permatex spray head sealer. No issues what so ever at 750-800hp. All surfaces are better than 15ra. I found this was key to the seal.

Thx for the info!

http://www.idavette.net/hib/ls6/page3.htm for the LS1 vs LS6 block.

The LS6 has the best ventilation of the 5.7 blocks. I wouldn't be concerned with any weakness due to the change in sleeve design for the ventilation. The 97/98 blocks have thinner walls but many have put forged pistons in and run nitrous.

I have heard the rumors that LS heads could be put on a Ford block never a read of a finished motor. Many have used 302/351W headers by cutting off the flanges and welding on LS flanges, the RX7 LS swap guys really explored that mod.

The LS7 blocks from what I've read are most likely to have the bores distort but isn't Stielow running a LS7 block in his latest build using a LS9 top end with blower?

I agree on the aftermarket heads and would go with an AFR or TFS.

IMO LS6 or LS2 block, forged rods/pistons on a stock crank with a some heads that you get a solid deal on and you'll turn big #s on a relative budget. Is the cool factor of a LS7 block build worth small tq gain and extra risk of head gaskets, $$, etc.? IMO no.

Gokou has a nice LS2 TT build going:

http://www.chevelles.com/forums/showthread.php?t=302484

If you have the budget and are not concerned with the weight a LSX block with 6 bolts heads would likely be the most reliable.

A hot ticket on LS1tech now seems to be turbo Mustangs using a 5.3 as the compression is low and motors can be cheap and easily.

[RSX302]

http://www.idavette.net/hib/ls6/page3.htm for the LS1 vs LS6 block.

The LS6 has the best ventilation of the 5.7 blocks. I wouldn't be concerned with any weakness due to the change in sleeve design for the ventilation. The 97/98 blocks have thinner walls but many have put forged pistons in and run nitrous.

I have heard the rumors that LS heads could be put on a Ford block never a read of a finished motor. Many have used 302/351W headers by cutting off the flanges and welding on LS flanges, the RX7 LS swap guys really explored that mod.

The LS7 blocks from what I've read are most likely to have the bores distort but isn't Stielow running a LS7 block in his latest build using a LS9 top end with blower?

I agree on the aftermarket heads and would go with an AFR or TFS.

IMO LS6 or LS2 block, forged rods/pistons on a stock crank with a some heads that you get a solid deal on and you'll turn big #s on a relative budget. Is the cool factor of a LS7 block build worth small tq gain and extra risk of head gaskets, $$, etc.? IMO no.

Gokou has a nice LS2 TT build going:

http://www.chevelles.com/forums/showthread.php?t=302484

If you have the budget and are not concerned with the weight a LSX block with 6 bolts heads would likely be the most reliable.

A hot ticket on LS1tech now seems to be turbo Mustangs using a 5.3 as the compression is low and motors can be cheap and easily.

Good info...Thx

I called up Texas Speed...

They are telling me that with 10psig boost at 700-800hp, the sleeves will not be a problem.

The engine:
TSP347 LS1/LS6 Longblock = $7100
Wiseco -11cc pistons
Eagle Rods w/ARP
Stock Crank (3.622)
6.0L Heads (72cc)

Looking good to meet my $10K engine target.

[RSX302]

They look to be the same bolt pattern..It's funny how GM used some of Ford tech. DOH!

Head water ports are different...with I'm sure other issues.

The exhaust port spacing is the same between the Ford and LS so I could try and use the turbo manifolds that I have with an adapter. (I think someone already mentioned that?)

I need to find someone with a spare LS engine laying around to do a test fit.....

I got it...Bones Fab!
He's got a old one sittng in his shop...I'm calling you tomorrow Jim!

Got the LS1 longblock from Bones Fab for a quick mock-up. Unfortunately the Ford turbo manifolds didn't fit between the rails.

I like Gokou's twin set-up. I was wondering if anybody had used the stock cast iron manifolds. Looked to work good.

[RSX302]

I would like to thank everyone that has participated in this thread. It has given me the direction that should suit the Camaro well as well as lift about 100lbs off the nose.

Thx again!

[Memphis]

Got the LS1 longblock from Bones Fab for a quick mock-up. Unfortunately the Ford turbo manifolds didn't fit between the rails.

I like Gokou's twin set-up. I was wondering if anybody had used the stock cast iron manifolds. Looked to work good.

A lot of people take truck manifolds and flip them around. I know of a drag radial car that has been 7.4s on a truck manifold setup and over 200mph.

[ArtosDracon]

Flipped truck manifolds are good, as would LS7 manifolds if you were willing to cut the flange and flip them 180 on the same side.

[RSX302]

Flipped truck manifolds are good, as would LS7 manifolds if you were willing to cut the flange and flip them 180 on the same side.

I was looking at the LS7 manifolds/headers. Once I get the new "LS6" and installed , I will try different turbo locations to see what I like.

The nice thing I like about my Garrett GTBB35's is how small they are. Would be too cool to get four of them for a quad system. Not that I need 1600hp. That would be LSX block territory. Now were getting heavy again...ok back to reality.

The GTBB35's turbos are only 7" x 7" and good to 400hp ea. Quick spool..full boost by 2500rpm.

[JerseyNova]

Love the car man, nice color.

Texas Speed would deffinitely be your best bet for any direction you go. Here is a link to a article I read it has some good information for where you are going. Mostly N/A stuff but still good none the less.
http://www.highperformancepontiac.co...rt2/index.html

Keep us posted!

****ty Paint edit but what ever Mirrors reminded me of t-rex arms they look so weird on the car lol.

[RSX302]

Love the car man, nice color.

Texas Speed would deffinitely be your best bet for any direction you go. Here is a link to a article I read it has some good information for where you are going. Mostly N/A stuff but still good none the less.
http://www.highperformancepontiac.co...rt2/index.html

Keep us posted!

****ty Paint edit but what ever Mirrors reminded me of t-rex arms they look so weird on the car lol.

So you don't like my t-rex arm mirror...LOL

The only complaint I have with the C5 mirrors is my butt hits them when I'm cleaning the car... Otherwise I think they look and work awesome!

I'm still at a loss between what block to go with my turbos.

LS or LQ?
and who can tell me how GM rates there blocks? Max hp / 2 = ? LOL
LS2/6 = 450hp
L92/LS3 = 525hp
LQ9 = 500hp

Appears that the L92/LS3 would be the choice in terms of max Hp rating, but we all know that all these engines handle 1000+hp.

I would have thought the LQ9 would be rated higher?

With the Cast Iron Ford R302, Turbo Manifolds & Intercooler, my car weighed in at 3600lbs without me. When I turned a 1:38 at Willow Springs big track with two 240+lbs guy's (4100lbs), I was blowing by most everybody that was out there which turned some heads. Vettes, BMW M5's, AC Cobras, Lotus'..etc..The guys that I was having a hard time keeping up with was the Porsche' --New Turbo Porsche--1:35's.

So I wonder how much 100lbs off the nose is worth in terms of lap times? (Just kick out the 250lbs Passengers..LOL)

[Vegas69]

Not as much as you'll be lead to believe around here. I dropped over 100lbs off my nose and I can't say it's a huge deal.

[93Polo]

I would not be concerned with what GM rated the blocks at, so many have blown past those #s on all 3 blocks. There is a guy over on performancetrucks that claims he put down over 600rwhp on a turbo 4.8. The pic I linked into Gokou's topic was a local truck manifold twin turbo 5.7 ls1 or ls6 block running a stock crank that eventually went up to 900rwhp.

On the heads, when I was researching a maggie build in place of the heads and cam I did on my C5, the 72cc chamber truck heads had a larger diameter chamber than a 5.7 (3.9") block bore making the chamber a mushroom.

I also like Vengeance Racing localy for LS motorand mods. Last I heard, they have Pro-line do the assembly which builds Tim Lynch's and other racers Outlaw 10.5" tire turbo motors. Ron Mowen is the guy to talk to at Vengeance. They do ship anywhere.

[ArtosDracon]

In Road racing or longer tracks it won't make as big a difference in lap times, you're likely more limited by other factors, it will make it a bit easier to turn the same lap times though. On an autocross, it does make a bigger difference because of how rapidly the weight has to shift.

[RSX302]

Not as much as you'll be lead to believe around here. I dropped over 100lbs off my nose and I can't say it's a huge deal.

In Road racing or longer tracks it won't make as big a difference in lap times, you're likely more limited by other factors, it will make it a bit easier to turn the same lap times though. On an autocross, it does make a bigger difference because of how rapidly the weight has to shift.

I think you're right...that's kinda how I'm seeing it too...

We all know in any competitive racing, weight and power is everything. (not to mention driver skill and car set-up) I'm not going to loose sleep over a half a second or less on the track. I'm looking more toward reliability and longevity at 800hp.

Since I built my car to be a full street with occasional fun at the track, I know it will be a good showing, but never finish top in events with cars having nothing more then carbon fiber and aluminum engines. (Big, small or autocross tracks) This is where weight classes come into play. Kinda hard to put a 2500lb AC Cobra against a 3200lb Camaro let alone a 3600lb Camaro. . The more competitive the car gets the less street it becomes. Everybody has a different level that they are willing to tolerate.
Me; I like cruising from a local event when its 100deg outside with my power windows up the A/C on cranking my 1000watt 14 speaker sound system. Not with my hand crank windows down sweating in the seats hearing the hot wind hit my ear.. to each his own I guess..

[RSX302]

I would not be concerned with what GM rated the blocks at, so many have blown past those #s on all 3 blocks. There is a guy over on performancetrucks that claims he put down over 600rwhp on a turbo 4.8. The pic I linked into Gokou's topic was a local truck manifold twin turbo 5.7 ls1 or ls6 block running a stock crank that eventually went up to 900rwhp.

On the heads, when I was researching a maggie build in place of the heads and cam I did on my C5, the 72cc chamber truck heads had a larger diameter chamber than a 5.7 (3.9") block bore making the chamber a mushroom.

I also like Vengeance Racing localy for LS motorand mods. Last I heard, they have Pro-line do the assembly which builds Tim Lynch's and other racers Outlaw 10.5" tire turbo motors. Ron Mowen is the guy to talk to at Vengeance. They do ship anywhere.

I'm not all that concerned that the block can't handle over GM's ratings, just wondered how they come up with it. There must be some reason why the LS3 block is rated higher then the LS1/2 & 6? I can only assume they go by the weekest link (block, sleeves, mains etc..) and rate it with some kind of engineering mathmatics?

From what I've heard and read, it looks like the LS6 & LS3 is the counterpart fix to the LS1 & LS2 with bay to bay breathing etc. The LS1/2 & 6 all kept the same rating of 450hp where as the LS3 jumps to 525hp? I'm sure GM didn't pull that out of their

[RSX302]

Ok...here we go with project RSX transplant. I will try and keep updated pics of the changeover. Should have the LQ9 shortblock from Texas Speed in a couple of weeks.

[ArtosDracon]

Good choice on the LQ9 IMHO, should fit well with your car. Especially with a couple turbos

[csx4766]

COOL, Whats going to happen to the Ford Long Block?

[RSX302]

COOL, Whats going to happen to the Ford Long Block?

I haven't been very aggressive with selling, but I was thinking of crating and saving for another project. Too nice of a motor..If someone wants to buy for the right price....I'm open...

[RSX302]

Good choice on the LQ9 IMHO, should fit well with your car. Especially with a couple turbos

Thx..I thought so too..I overlooked the 70lb weight difference from the LS2/3/6 aluminum blocks for a nice strong base for the 800hp twins. Bonus was the block is only $700 bucks...

[formula98]

Any Updates on your Swap? I read through your original build years back, can't wait to see your changes.....