dohc block w/ sohc head

Have a question about how to make horsepower going the all motor route, here's where to ask it.
Post Reply
2fastneon
1GN Registrant
Posts: 220
Joined: Thu Jun 28, 2007 11:06 am

dohc block w/ sohc head

Post by 2fastneon » Fri Oct 26, 2007 5:14 pm

i was planning to run a crane 14 in the head the head has a valve job and is shaved .040 thousands, a mp dohc computer, and long tube headers, with 3.0 intake, atx tb you guys think this will be a good set up for 14's quarter mile. there will probably be a couple more mods but with that compression i was thinkin itd be pretty fast?
"wait till my vtec kicks in" NOT!!!

User avatar
INVUJerry
1GN Registrant
Posts: 1472
Joined: Tue Feb 13, 2007 11:50 am
Location: Baltimore, MD

Post by INVUJerry » Fri Oct 26, 2007 7:05 pm

Yeah, should be good, but I think your going to have piston to head clearance issue. Might want to make sure your pistons aren't hitting stuff when you assemble the block.
2005 Neon SXT Black - SOLD
1998 Neon Coupe - SOLD
2004 Neon SRT-4 - 13.9@102
1995 Neon ACR NYG Sedan - 12.5:1 SOHC coming
1996 ACR Sedan - Koni yellows, stock as hell
Image
Free Philly

ubengineering
1GN Registrant
Posts: 539
Joined: Fri Oct 19, 2007 1:01 am

Post by ubengineering » Fri Oct 26, 2007 7:33 pm

idk why u jus dont get the dohc head but its your choice, either way on my dd i was gonna put the doch pistns in my block (sohc head) but then decided its too much of a risk because on some blocks for some reason the pistons need to be filed down or else they rub and break and such. Thats about half of what i heard other ppl said it worked out awesome for like 10 more horse. Come spring im jus gonna grind down the head .02 (.04 max atleast wouldnt recommend goin past it) for like 5 horse and leave the rest stock. the junkyards sell the heads for like 25 bux either or around my house, id jus get a fresh head and start there
My Fleet:
95 neon sohc atx daily driver during summer
96 neon sohc mtx hahn stage 5 night rider
94 plymouth sundance aka black betty beater
Kawasaki ninja 600cc

User avatar
1fast2liter
1GN Registrant
Posts: 1231
Joined: Thu Mar 01, 2007 3:30 am
Location: Beaver dam, WI

Post by 1fast2liter » Fri Oct 26, 2007 11:03 pm

with a dohc pistons and sohc head youll be lookin at around 10-1 compression...no filing of any thing is needed..
Image

96 blue coupe sold
96 white 4 door sold
95 blue sport parted out
97 straberrie red coupe sold
95 black base parted out

current drivers
97 dodge ram 1500 5.9 ext cab sport fire engine red. tinted windows cat back exhaust suer chips tune, 1 mephis audio sub

90 audi 80. 400 miles to the tank
2002 custom sportster 90 whp and quick too

2fastneon
1GN Registrant
Posts: 220
Joined: Thu Jun 28, 2007 11:06 am

Post by 2fastneon » Sat Oct 27, 2007 9:31 am

i was going to say i see people running 12 to 1 compression and they dont seem to have clearance problems i kno there are valve reliefs but wutevr. i would do a dohc but i kinda like my single. i also have a dohc already just it a pain in my ass to work on compared to my single. also with my single theres more room in the engine bay, and i hate the way the dohc's intake mani is connected to the thermostat housing, idk its alotta things i dunno what to do yet. :?

is there anyone else who has done this before i kno people have i would just also like input from them personaly thnks
"wait till my vtec kicks in" NOT!!!

SloUSDM20
1GN Registrant
Posts: 346
Joined: Mon Feb 12, 2007 2:26 pm
Location: Chesapeake, VA

Post by SloUSDM20 » Sat Oct 27, 2007 9:14 pm

im using the SOHC head w/ Crane #12 on a DOHC block. but my head isnt shaved that low tho(about .020). yea you may have some piston to valve clearance issues. I think you need to check that out.

Im told the CR with that combo is raised at about 10.3:1. itll probably be higher than that since your head is decked a little more. Im using a modded MLS head gasket. read more on it, im sure the .org has more info. but there's the chance someone will reply with a "SEARCH" statement...lol
Image
[One of 1gn.org's first 50] Member #41
2.4L DOHC Naturally Aspirated
Crower Stg 3 Cams, Crower Valvesprings, and more...

User avatar
1fast2liter
1GN Registrant
Posts: 1231
Joined: Thu Mar 01, 2007 3:30 am
Location: Beaver dam, WI

Post by 1fast2liter » Sun Oct 28, 2007 12:44 am

try this it mite help....


as long as the head is not shaved only trued their should be no real problems.. if you use high compresion pistons they will be made for your motor.
Image

96 blue coupe sold
96 white 4 door sold
95 blue sport parted out
97 straberrie red coupe sold
95 black base parted out

current drivers
97 dodge ram 1500 5.9 ext cab sport fire engine red. tinted windows cat back exhaust suer chips tune, 1 mephis audio sub

90 audi 80. 400 miles to the tank
2002 custom sportster 90 whp and quick too

2fastneon
1GN Registrant
Posts: 220
Joined: Thu Jun 28, 2007 11:06 am

Post by 2fastneon » Sun Oct 28, 2007 8:49 am

well the head was never shaved before i originally told the guy to shave it .030 but somehow they did .040 idk. i was doing the math on that compression calculator and with dohc block and sohc head shave .040 my compression will be about 11.1 to 1 lol i might just get another head and shave it .020, i dont think the motor is gonna hold up to that compression
"wait till my vtec kicks in" NOT!!!

SloUSDM20
1GN Registrant
Posts: 346
Joined: Mon Feb 12, 2007 2:26 pm
Location: Chesapeake, VA

Post by SloUSDM20 » Tue Oct 30, 2007 2:11 pm

it should. but if you have an upgraded cam of some sort, i dont know. 040 seems like too much shaving. like i said look it up.
Image
[One of 1gn.org's first 50] Member #41
2.4L DOHC Naturally Aspirated
Crower Stg 3 Cams, Crower Valvesprings, and more...

chipdogg
1GN Registrant
Posts: 2180
Joined: Wed Mar 14, 2007 12:30 pm
Location: Muscoda, wi

Post by chipdogg » Tue Oct 30, 2007 2:59 pm

Do it, bolt it all together (use old head bolts and other TTY bolts like the rod cap bolts) but put a small thin layer of clay on the pistons. Time it, and turn it over a few times. Take it back apart. See if anything hit the clay. If not, then you are good. If there's clay anywhere, figure out how much clearance it has. If you gooped the shit on there obviously it ain't gonna work but if it's real thin, it'd be fine to check for clearances.
'97 black ACR coupe- #3 - Scrappy
'96 black coupe- #4
'97 magenta coupe- #10 - 13.379 @ 101.07 mph
'04 SXT mtx - #45 - GF's DD
'96 ACR
'95 Astro Van
'11 Chevy Express
'02 atx - #48
'98 Intense Blue R/T - #49
'04 SRT-4 - #50
'99 Intense Blue R/T - #51

52 and counting, when will it stop?

2fastneon
1GN Registrant
Posts: 220
Joined: Thu Jun 28, 2007 11:06 am

Post by 2fastneon » Tue Oct 30, 2007 3:39 pm

sounds like an idea i think ill try that before i throw it together and try to start it and waste alot of money
"wait till my vtec kicks in" NOT!!!

User avatar
Rice_Eater
1GN Registrant
Posts: 120
Joined: Wed Mar 14, 2007 1:03 pm
Location: eastpointe

Post by Rice_Eater » Tue Oct 30, 2007 4:02 pm

do what chip said. thats is what a friend told me he did and he has 13.1. but i got the dohc with sohc top not milled (which is 10.3:1), mpx longtube, mopar 95 sohc, magnacore wires, atx tb, 3.0 intake, ghetto udp, no ps or ac, mancini racing strut bars, solid mounts all around, booger bushing, alot of weigh reduction and 355 trans. and holy cow i beat a stock 1gn rt by like 6 cars the tires just dont want to stop spinning when i launch. i have to half throlled it till it catches then gun it. 1st gear at a roll just spins out. i was going to swich to the 394 trans but seeing as it flys throw the rpms im not going to.
Definition of Rice Eater
Requirements when you initially register!! Click Here
Image
Image

Post Reply