SHP block - 1pc vs 2pc RMS
#1
SHP block - 1pc vs 2pc RMS
I am trying to decide which block is better for me.
I am currently building a 400sbc (330817) 2bolt engine right now. I need this to run for one more year and then upgrade to a SHP block for next season.
I am trying to potentially use some of the same parts to carry over to the SHP block.(valve train)
Some of the benefits of the 1 pc rms is that I can use an OE roller cam and lifters. And potentially better sealing of the rear main.
http://www.summitracing.com/int/part...211l/overview/
A roller cam set up is about $500
Some benefits of the 2pc RMS is slightly cheaper.
http://www.summitracing.com/int/part...1211/overview/
A retro roller cam set up is about $825 for cam and lifters
Any more insight that I am missing?
I am currently building a 400sbc (330817) 2bolt engine right now. I need this to run for one more year and then upgrade to a SHP block for next season.
I am trying to potentially use some of the same parts to carry over to the SHP block.(valve train)
Some of the benefits of the 1 pc rms is that I can use an OE roller cam and lifters. And potentially better sealing of the rear main.
http://www.summitracing.com/int/part...211l/overview/
A roller cam set up is about $500
Some benefits of the 2pc RMS is slightly cheaper.
http://www.summitracing.com/int/part...1211/overview/
A retro roller cam set up is about $825 for cam and lifters
Any more insight that I am missing?
#2
Supreme Member
iTrader: (1)
Join Date: Sep 2005
Posts: 26,027
Received 1,662 Likes
on
1,261 Posts
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: SHP block - 1pc vs 2pc RMS
Any more insight that I am missing?
http://www.dartheads.com/products/sh...all-block.html
Including "Provisions for OE stock roller lifters and cams", applicable to the whole product line.
#3
Supreme Member
Re: SHP block - 1pc vs 2pc RMS
If you plan to re-use the crankshaft that will dictate if a 2 or 1 pc rear main is needed on the future SHP block
It will also determine the journal size of the future block as well.
SO if you plan to re-use the 400 crank from your current 400 build the future SHP block can only be 2 pc rear main with 400 main journals.
WTH are you going to race now? it's almost December next season starts in 5 months ! or do you mean 2017?
It will also determine the journal size of the future block as well.
SO if you plan to re-use the 400 crank from your current 400 build the future SHP block can only be 2 pc rear main with 400 main journals.
WTH are you going to race now? it's almost December next season starts in 5 months ! or do you mean 2017?
Last edited by FRMULA88; 11-25-2014 at 01:36 PM.
#5
Re: SHP block - 1pc vs 2pc RMS
Right now I am rebuilding a stock 400sbc.(cast dish pistons, stock 5.565 rods and 3.75 stock crank) 9.2-1 compression, afr195, LT1 intake, 1 7/8 LT with hopefully a 150hp shot of nitrous.
I am going to run this engine for the 2015 season.
Then start assembling the SHP 400 block a year from now. Still deciding on a 406/414/421 cubes. Fully forged rotating assembly
AFR 195 for now, then for 2017 go with AFR227.
By that time I'll run a carb and different nitrous set-up, and hopefully roller cam of somesort(solid or hyd)
I will not use any of the stock rotating assembly(just possibly the valvetrain if it transfers over)
I am going to run this engine for the 2015 season.
Then start assembling the SHP 400 block a year from now. Still deciding on a 406/414/421 cubes. Fully forged rotating assembly
AFR 195 for now, then for 2017 go with AFR227.
By that time I'll run a carb and different nitrous set-up, and hopefully roller cam of somesort(solid or hyd)
I will not use any of the stock rotating assembly(just possibly the valvetrain if it transfers over)
#7
Supreme Member
iTrader: (20)
Re: SHP block - 1pc vs 2pc RMS
Thats what i have now. 2 pc block and oem roller stuff. Well i had spider but recently went link bar lifters but still use 87-99 style step nose cam, same timing chain and cover, same retaining plate for cam.
I am one of the highest hp numbers that i know of running thru the shp block...its a very stout piece
Hopefully carl sees this thread from cnc blocks northeast
I am one of the highest hp numbers that i know of running thru the shp block...its a very stout piece
Hopefully carl sees this thread from cnc blocks northeast
Trending Topics
#9
#11
Re: SHP block - 1pc vs 2pc RMS
BBC's lifters are only a .843 lifter bore same as the SBC,
The Dart SHP Pro block has .904 lifter bores and uses a BBC cam tunnel.
Anytime you can go to a bigger base circle cam = smoother valve action better profile, I machine a lot of blocks for 55MM cam cores which seems pretty popular now a days SBC, BBC and SBF.
.904 lifters, Bigger lifter and just about all .904 lifters are pressure fed, Bigger wheel = less revolutions around the lobe. Bigger body = stronger lifter. Bigger wheel = less pressure angle.
Going to a .904 lifter is very common now.
#12
Supreme Member
iTrader: (20)
Re: SHP block - 1pc vs 2pc RMS
When i ran stock lifters, they were stock gm ls7 lifters. I ran them just fine in 230 deg cams at .600" lift but really it comes down to spring pressures.
I switched to morel link bars when i went 246 deg .640" hyd roller that required 180- ish lbs seat pressure and 450 lbs open. Thats getting to be high for a gm lifter. Gm ls7 lifters are better than pre 97 lifters. They have better valving internally and are good for most applications.
I switched to morel link bars when i went 246 deg .640" hyd roller that required 180- ish lbs seat pressure and 450 lbs open. Thats getting to be high for a gm lifter. Gm ls7 lifters are better than pre 97 lifters. They have better valving internally and are good for most applications.
#13
Re: SHP block - 1pc vs 2pc RMS
When i ran stock lifters, they were stock gm ls7 lifters. I ran them just fine in 230 deg cams at .600" lift but really it comes down to spring pressures.
I switched to morel link bars when i went 246 deg .640" hyd roller that required 180- ish lbs seat pressure and 450 lbs open. Thats getting to be high for a gm lifter. Gm ls7 lifters are better than pre 97 lifters. They have better valving internally and are good for most applications.
I switched to morel link bars when i went 246 deg .640" hyd roller that required 180- ish lbs seat pressure and 450 lbs open. Thats getting to be high for a gm lifter. Gm ls7 lifters are better than pre 97 lifters. They have better valving internally and are good for most applications.
Basing all our info on just one engine is not as good as a shop that has seen what happens when you exceed the limits of OEM lifters. I wish I kept track of all the calls and emails about OEM lifter failures. Chris will confirm what I am saying.
Last edited by HINKSON AUTO; 11-26-2014 at 06:45 AM.
#15
Supreme Member
iTrader: (20)
Re: SHP block - 1pc vs 2pc RMS
Check with Chris Straub http://www.straubtechnologies.com/ he knows the stats on those OEM lifters and what they are good for.
Basing all our info on just one engine is not as good as a shop that has seen what happens when you exceed the limits of OEM lifters. I wish I kept track of all the calls and emails about OEM lifter failures. Chris will confirm what I am saying.
Basing all our info on just one engine is not as good as a shop that has seen what happens when you exceed the limits of OEM lifters. I wish I kept track of all the calls and emails about OEM lifter failures. Chris will confirm what I am saying.
That being said i am not basing this on just one engine lol i am deeply rooted in the car scene in my town and know all the shops. havent seen one lifter failure with the new ls lifters used. There are dozens and dozens of cammed cars around here with no issue. Cams arent crazy and spring pressures arent super high so they do live well. IF you dont push the limits.
Last edited by Orr89RocZ; 11-26-2014 at 09:32 AM.
#17
Re: SHP block - 1pc vs 2pc RMS
Justin you have been on the edge for a long time and I love it!!!!
#18
Re: SHP block - 1pc vs 2pc RMS
Any one building a 3.750 stroke or smaller I would recommend the Pro Block with a stroker rod like a Callies, Crower, Scat, Oliver ETC there is plenty of cam to rid clearance.
Last edited by HINKSON AUTO; 11-27-2014 at 07:12 AM.
#20
Re: SHP block - 1pc vs 2pc RMS
If you were going to use a Honda journal rods or the Callies Ultra HD 2.100 rods you can use the 2.100 Callies Compstar rods but will have to use a reduced base circle cam.
Here is a build I did last year.
http://www.chevelles.com/forums/showthread.php?t=481081
Here is a build I did last year.
http://www.chevelles.com/forums/showthread.php?t=481081
#22
Re: SHP block - 1pc vs 2pc RMS
Thread
Thread Starter
Forum
Replies
Last Post
skinny z
Engine/Drivetrain/Suspension Parts for Sale
5
10-05-2015 06:23 PM