C5R Block VS Standard LS1
Thread Starter
Launching!
Joined: Nov 2001
Posts: 299
Likes: 0
From: Savannah, TN
C5R Block VS Standard LS1 Can the C5R block be swapped out for a standard LS1 Block or are their differences in the water jackets/heads lining up etc? I'm wondering because I've got a 427 built by MMS. It's got a cracked block or head (I think it's in the block). It slowly loses pressure in a coolant pressure test. Even though the engine has less than 700 miles on it MMS says it's it's not thier problem.. but that's a different story. The heads are being tested today and the block will be tested Monday if the heads are ok. I'm thinking of reusing the valvetrain, rotating assembly and heads on a C5R block if it's possible. Any thoughts?
7 Second Club
iTrader: (5)
Joined: Jan 2003
Posts: 2,064
Likes: 0
From: Grove City Ohio/Port Washington L.I sometimes
Re: C5R Block VS Standard LS1 I think every thing bolts up.A C5R block is big money $6500.00 for a bare block.I would be chatting with MMS about this.
Thread Starter
Launching!
Joined: Nov 2001
Posts: 299
Likes: 0
From: Savannah, TN
Re: C5R Block VS Standard LS1 It's definitely the block. There's a tiny crack in the sleeve and block at the thinnest part of the cylinder wall. Bummer.
I have 
Al says "there's no warranty on nitrous engines." It doesn't matter that I haven't run nitrous. It's not even installed yet. I didn't get the intake back from NX until April (direct port). I was still breaking it in last month when this happened... less than 700 miles on it. After a year and a half of waiting on mods (th400, engine, rear end, etc... waited at least three months for each...) I've had it. Considering the time, money, and warranty, I'm not dropping another dime into these cars. It's just not worth it. Next time I'll buy a Z06 and just be happy driving it.
I think every thing bolts up.A C5R block is big money $6500.00 for a bare block.I would be chatting with MMS about this.
Al says "there's no warranty on nitrous engines." It doesn't matter that I haven't run nitrous. It's not even installed yet. I didn't get the intake back from NX until April (direct port). I was still breaking it in last month when this happened... less than 700 miles on it. After a year and a half of waiting on mods (th400, engine, rear end, etc... waited at least three months for each...) I've had it. Considering the time, money, and warranty, I'm not dropping another dime into these cars. It's just not worth it. Next time I'll buy a Z06 and just be happy driving it. 7 Second Club
iTrader: (5)
Joined: Jan 2003
Posts: 2,064
Likes: 0
From: Grove City Ohio/Port Washington L.I sometimes
Re: C5R Block VS Standard LS1 I understand your frustration,had a similar situation with Strope Speed Shop.You can get a big-bore sleeved block from ARE for about $2300.00 and use the stuff you have.They have a proven product.Give Barry a call at 905-420-9195, you have too much invested to throw in the towel.
Re: C5R Block VS Standard LS1 DONT GIVE UP!!! U guys CAN work it out. Terry Burger is always boasting how good service and everything else is at MMS, now THIS would be a good time to show it. I have had some bad luck recently and my new 409 bored & stroked comes with a year warranty. Good Luck from what I understand MMS is a good reptutable shop so heres to that! 
Good Luck!
Good Luck! Thread Starter
Launching!
Joined: Nov 2001
Posts: 299
Likes: 0
From: Savannah, TN
Re: C5R Block VS Standard LS1
I understand your frustration,had a similar situation with Strope Speed Shop.You can get a big-bore sleeved block from ARE for about $2300.00 and use the stuff you have.They have a proven product.Give Barry a call at 905-420-9195, you have too much invested to throw in the towel.
I do have to compliment Strange and FLP, the 12 bolt and driveshaft from Strange and the TH400 from FLP work great. Being in a wheelchair (no use of my legs) I was worried about having to shift the TH400 all the time but man, it works great. There's really less shifting than I thought. And, the Gearvendors OD, works great too... ah, one day I'll have it back and it'll actually work.
Re: C5R Block VS Standard LS1 I personally think that is some BS, you only have 700 miles on your engine and they will not help you out. Sounds like a definite flaw on there part. I guess you could spend a few grand with MMS and have them give a POS engine for use with nitrous and it is not their fault. Well, this may only be an isolated incident and I have only heard one side of the story but I don't think I will EVER buy anything from MMS. Money is too hard for me to come up with to just give it to someone and not get any kind of service or product in return.
Trending Topics
Staging Lane
Joined: Jul 2002
Posts: 91
Likes: 0
From: Austin/Westlake
Re: C5R Block VS Standard LS1 i cant believe i am hearing this..
i always thought MMS was a halfway decent company. i know there is no sponsor bashing allowed, but i can say that after this and a few other things i have heard.. i will never spend a dime with them.
i always thought MMS was a halfway decent company. i know there is no sponsor bashing allowed, but i can say that after this and a few other things i have heard.. i will never spend a dime with them.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
TECH Regular
Joined: Nov 2001
Posts: 489
Likes: 0
From: NorCal
Re: C5R Block VS Standard LS1
i cant believe i am hearing this..
i always thought MMS was a halfway decent company. i know there is no sponsor bashing allowed, but i can say that after this and a few other things i have heard.. i will never spend a dime with them.
i always thought MMS was a halfway decent company. i know there is no sponsor bashing allowed, but i can say that after this and a few other things i have heard.. i will never spend a dime with them.
TECH Fanatic
Joined: Jan 2002
Posts: 1,471
Likes: 0
From: Houston, TX
Re: C5R Block VS Standard LS1 I do have to compliment Strange and FLP, the 12 bolt and driveshaft from Strange and the TH400 from FLP work great. Being in a wheelchair (no use of my legs) I was worried about having to shift the TH400 all the time but man, it works great. There's really less shifting than I thought. And, the Gearvendors OD, works great too... ah, one day I'll have it back and it'll actually work.
TECH Enthusiast
Joined: May 2002
Posts: 508
Likes: 0
From: rochester,ny
Re: C5R Block VS Standard LS1 well then i suggest mms step up to the plate.
ill ad this if you bought *as is* then you probally got it cheap and thats what happens. now if there is no warranty for a nitrous engine(seems odd that if its build for it then there should be some kind of coverege. really what if the second time its started 6 pistons shatter? there should be something) now being 700 miles and no nitrous and there block problems? to me its shady. there are to sides to a story. this is true. ive heard on side and till i hear the other side i will believe iateyourcat. is mms can step up and present their side than my decision is based on who i think is telling the truth or at least most of it. like a juror
to the authur, sorry to hear that and its a same. good luck on getting it back to par. no matter what something will be used for if your paying big bucks make sure you get some kind of support and service. there are good places and people still out there just hard to find.
good luck and keep us posted!
ill ad this if you bought *as is* then you probally got it cheap and thats what happens. now if there is no warranty for a nitrous engine(seems odd that if its build for it then there should be some kind of coverege. really what if the second time its started 6 pistons shatter? there should be something) now being 700 miles and no nitrous and there block problems? to me its shady. there are to sides to a story. this is true. ive heard on side and till i hear the other side i will believe iateyourcat. is mms can step up and present their side than my decision is based on who i think is telling the truth or at least most of it. like a juror
to the authur, sorry to hear that and its a same. good luck on getting it back to par. no matter what something will be used for if your paying big bucks make sure you get some kind of support and service. there are good places and people still out there just hard to find.
good luck and keep us posted!
Thread Starter
Launching!
Joined: Nov 2001
Posts: 299
Likes: 0
From: Savannah, TN
Re: C5R Block VS Standard LS1 [quote
That's cool. My brother-in-law runs a TH400 behind his NOS fed 454 in his '68 Camaro. He is in a wheelchair also. He does complain about shifting though. Just because the old car gets a little more squirly. There is another guy on the board in a wheelchair that I know of. His name is Bryce from Arizona. He runs 10's I believe. We met him at the Spring Break Shootout. He was a really nice guy. Hope you get eveything worked out. How's that overdrive?
[/quote]
The OD works great. Without the OD the car was running right around 3250 at 70 on the highway. With the OD kicked in that drops down to about 2600 which is pretty noticable. I got about 18mpg on the first tank which was a mix of suburb and country roads. I never got to drive a tank through it on the highway but I'd hope for 25mpg.
That 454 must haul some ***
That's cool. My brother-in-law runs a TH400 behind his NOS fed 454 in his '68 Camaro. He is in a wheelchair also. He does complain about shifting though. Just because the old car gets a little more squirly. There is another guy on the board in a wheelchair that I know of. His name is Bryce from Arizona. He runs 10's I believe. We met him at the Spring Break Shootout. He was a really nice guy. Hope you get eveything worked out. How's that overdrive?
[/quote]
The OD works great. Without the OD the car was running right around 3250 at 70 on the highway. With the OD kicked in that drops down to about 2600 which is pretty noticable. I got about 18mpg on the first tank which was a mix of suburb and country roads. I never got to drive a tank through it on the highway but I'd hope for 25mpg.
That 454 must haul some ***
TECH Junkie
Joined: Dec 2001
Posts: 3,242
Likes: 0
From: Lakeland, FL
Re: C5R Block VS Standard LS1 Good luck on your new setup whatever it is, It seems that MMS has had some problems in the past with customer service, I hope they work this out for you, that is too much money to throw away.
Thread Starter
Launching!
Joined: Nov 2001
Posts: 299
Likes: 0
From: Savannah, TN
Re: C5R Block VS Standard LS1 I've got another question. Should the sleeves be perfectly flat against the top of the block? 4 of 8 cylinders are betwen 2 and 4 thousands recessed into the cylinder.
Re: C5R Block VS Standard LS1
I've got another question. Should the sleeves be perfectly flat against the top of the block? 4 of 8 cylinders are betwen 2 and 4 thousands recessed into the cylinder.