mdelorie Posted June 14, 2003 Report Posted June 14, 2003 Lookin' at a 98 Z34... with the L36... is it simply a matter of a new intake manifold, the blower, and some wiring to bring it up to an L67? or am I thinking too simplistically? Quote
cutlassdude96 Posted June 14, 2003 Report Posted June 14, 2003 you could but the L67 was design to hold up to the power of the SC and it would be better if you just drop in the SC engine in it. Quote
mdelorie Posted June 14, 2003 Author Report Posted June 14, 2003 well, what are the differences in the engines? besides intake manifold and SC, of course... same PCM, no? same pistons, heads, etc. no? Quote
cutlassdude96 Posted June 14, 2003 Report Posted June 14, 2003 the internals are stronger in the L67, then in the L36 and they can handle the power the suppercharger better then the N/A 3800. Quote
SmokesGTP Posted June 14, 2003 Report Posted June 14, 2003 I highly doubt they're that much stronger, that L36 is bulletproof as it is. Quote
mdelorie Posted June 14, 2003 Author Report Posted June 14, 2003 That's what I was thinking. but it really is that simple huh? cool! Quote
Bake82 Posted June 14, 2003 Report Posted June 14, 2003 The only thing that might not like it too much would be the Tranny right? Or are they the HD trannies in the 3800 aswell? To me that would be the thing I'd be worried about! Quote
91GranSport Posted June 14, 2003 Report Posted June 14, 2003 I'm sure Shawn will probably know, he has all the answers or any possible question. Seriously though, you're better off buying a used L67 in one piece along with the tranny. The 4T65-E can handle the torque from the L36, but all L67s were mated to the 4T65-E/HD. You can easily convert the 4T65-E to a 4T65-E/HD as there are conversion kits available. If I'm not mistaken, the L67 had forged pistons and crankshaft, stronger main bearings and connecting rods, and a different cylinder head set up. Obviously the supercharger as well as the intake manifold are different as well. Like I said, it's a lot of work to be switching so many internal engine components. You're better off buying the original L67. The only thing that might not like it too much would be the Tranny right? Or are they the HD trannies in the 3800 aswell? To me that would be the thing I'd be worried about! Quote
mdelorie Posted June 14, 2003 Author Report Posted June 14, 2003 you think work-wise it would be easier to swap the engine to beef up the existing one?? how about cost wise? Quote
Robby1870 Posted June 14, 2003 Report Posted June 14, 2003 The compression the L67 is much lower than that of the L36, so that you can run boost on the L67. The motors are very different along with the trannies. Your best bet would be to swap the entire motor/trans/subframe/wiring harness and computer. Robby Quote
mdelorie Posted June 14, 2003 Author Report Posted June 14, 2003 So I'm not any better off by buying a car with a 3800 than I am buying any other motor.... Bummer. Quote
god910 Posted June 14, 2003 Report Posted June 14, 2003 So I'm not any better off by buying a car with a 3800 than I am buying any other motor.... Not nec. that way you wouldn't really have to swap anything, it would be a bolt in, and you could sell the engine/tranny for money to buy the L67. There are many different things between the two engines, primarily: rotating assy. (compression ratio and strength) and heads (they have injector bosses in them as the S/C sits where the injects go on a n/a motor.) I am using a L36 block and heads, L67 rotating assembly, and series 1 upper intake, wiring harness, and a MegaSquirt SFI controller. I am going to turbo mine that's why I am keeping the heads, but like has been said, get it all together, and just bolt it in, that would be my suggestion. HTH Quote
mfewtrail Posted June 15, 2003 Report Posted June 15, 2003 Go to http://www.clubgp.com/forum and do a search for L36 + L67 top end or what have you....and you'll find more than enough info on the swap. The positives and negatives of doing this sort of thing have been laid out/discussed many times over there. HTH! Also the L36 internals are not as weak as people say there are...just ask the L36 CSC'd GP drivers what they're running on stock internals...although to the best of my knowledge, CSC's aren't nearly as rough on the motor as the roots style blowers. Quote
Heza Posted June 26, 2003 Report Posted June 26, 2003 The compression the L67 is much lower than that of the L36, so that you can run boost on the L67. The motors are very different along with the trannies. Your best bet would be to swap the entire motor/trans/subframe/wiring harness and computer. Robby yuppers! if you bolted on a SC to the L36, you would have to run lower boost because the L67 has lower compression. my buddy tried all that with his Ford 3.8 and trying to bolt on a Thunderbird SC charger to it, but compression is not something to be ignored. Quote
Regal GS Posted June 26, 2003 Report Posted June 26, 2003 Dont do it... just swap in the L67.. try to convert an l36 and you'll spend more $$ and end up with a mess... the interals are different,comp is 9.3 on L36... 8.5 on a L67.. different cam,rods,pistons,pcm,intake,heads,... and crank (i think)... not to mention weaker tranny... trust me the L67 tranny is weak enough... dont want anything worse Quote
mfewtrail Posted June 26, 2003 Report Posted June 26, 2003 Dont do it... just swap in the L67.. try to convert an l36 and you'll spend more $$ and end up with a mess... the interals are different,comp is 9.3 on L36... 8.5 on a L67.. different cam,rods,pistons,pcm,intake,heads,... and crank (i think)... not to mention weaker tranny... trust me the L67 tranny is weak enough... dont want anything worse How come the L36's with stock internals and CSC kits are still holding up well and are making some awesome times(I've fully aware that roots style sc's are a little more rough on your drivetrain also)? Just ask the few that run em' over at ClubGP One guy told me he had all stock internals, I believe he's in the 12's. Quote
LukeZ34 Posted June 26, 2003 Report Posted June 26, 2003 Here.. I think you might find this site of intrest. This guy has a 2000 Impala LS and he supercharged his L36 with the L67 parts. http://www.lynoise.com/ Quote
dbtk2 Posted June 27, 2003 Report Posted June 27, 2003 Everything in the L67 is strengthened. The rods, pistons, crank, everything. They have different cams also. Basically if you don't care about the L36 being as strong as the L67 you would have to change a lot of things. You would have to change the heads (which would bring your compression down), then you would have to get intake manifold, blower, tb, etc... You would have to get a new PCM, injectors that flow more, etc... It would take a lot of work, and $. And without changing the cam, it wouldn't run very good, so you would want to change the cam also. It would be much easier and cheaper to buy an L67 and swap it in, or put a CSC on your L36. Regal GS wrote: Dont do it... just swap in the L67.. try to convert an l36 and you'll spend more $$ and end up with a mess... the interals are different,comp is 9.3 on L36... 8.5 on a L67.. different cam,rods,pistons,pcm,intake,heads,... and crank (i think)... not to mention weaker tranny... trust me the L67 tranny is weak enough... dont want anything worse How come the L36's with stock internals and CSC kits are still holding up well and are making some awesome times(I've fully aware that roots style sc's are a little more rough on your drivetrain also)? Just ask the few that run em' over at ClubGP One guy told me he had all stock internals, I believe he's in the 12's. There are 2 people in the 12's with CSC'ed L36's. Matt M & Bridgett Meekhof, in case you were wondering they are married to each other. Bridgett has a CSC'ed '01 Monte Carlo SS that runs 12.1's, and Matt has a CSC'ed Grand Prix GT (I think its a '99 I don't remember) that runs 12.3's. They don't have beefed up internals depending on what "Internals" are to you. They have different cams, rocker arms, valve springs, lifters, etc... though, which to me is not beefed up internals, but it is to some. In case you were wondering, those aren't their only mods though. It isn't that easy to run that fast in a CSC'ed L36. I watched Matt M install a Stage 3 CSC (the highest stage you can get) on a GP GT that was fairly modded last weekend, and Matt estimated that it would run high 13's, so that tells you all the shit Matt & Bridgett have done to their cars. A CSC will add 100 ponies to the wheels on a stock L36 though. The cool thing though is Bridgett's Monte looks and sounds completely bone stock when idling. I am going to be cracking up when some loser in a Camaro SS or a C5 or Z06 or something pulls up next to that Monte and the Monte just rips them a new ***hole. Or when a Viper pulls up next to it and the Monte keeps up. Quote
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