Top End SOHC Completetion nears.....HID update

Do you have a project going or will you be starting a project here very soon and just want to keep a log of everything you and when? Share with everyone every step of the way what sort of progress you are making on your project.
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Erays3r
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Top End SOHC Completetion nears.....HID update

Post by Erays3r » Wed Oct 17, 2007 4:33 pm

So the next stage in the speedy turtles life is about to start. Have a bunch of parts on their way and a bunch more already here and waiting to be installed.

Heres the run down so far

Purchased a spare 10k head thats going to be sent off for a port/polish, 3 angle valve job , and while its being worked on a set of oversized stainless valves are going to be installed. Magnum springs and retainers are going in along with most likely a comp 400 because I found one for a great price shipped. I havent ordered the cam yet so I may yet end up with a crane 14.Which ever cam I go with it will be adjusted via a unorthodox cam gear.

Once the head is assembled and put on my block a TTI longtube header will bolt up to my existing 2.5" piping, havent decided to run a resonator yet , Im waiting to hear how it sounds with the vibrant muffler. Also have a Indy intake manifold and a mpx udp to install while Im in there.

The only part I think I havent lined up is the mopar ecu. Id like to pick one up from the forsale threads , but the only ones I ever see are DOHC and 96's I need a 97+ so if anyone out there has one let me know. I definitely need one.

I hope to have everything together and ready to bolt on by the end of the month. Ill be taking pictures shortly.

Keep in mind Im not building a race car , just something thats got a little more pep in it.
Last edited by Erays3r on Thu Apr 10, 2008 8:20 am, edited 1 time in total.

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Post by 6(sic)6 » Wed Oct 17, 2007 7:18 pm

Sorry I couldnt help with the head but best of luck to you
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Erays3r
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Post by Erays3r » Wed Oct 17, 2007 7:25 pm

6(sic)6 wrote:Sorry I couldnt help with the head but best of luck to you
Hey man its all good , I appreciate you being up front with me, and thanks for the well wishes.

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Post by TomZ » Wed Oct 17, 2007 8:33 pm

The PCM from a '96 will work on a '97-'99 with just one wire change, if I'm not mistaken (for the cooling fan). The Indy manifold may not be the best choice for a mild or non-boosted engine. Were I in your shoes, I'd sell the Indy and get a different intake manifold, Blackdog, AMM long runner or even a ported aluminum factory SOHC intake.
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Post by DOHCRT » Wed Oct 17, 2007 9:04 pm

For the valves, only oversize the exhaust valves. The intake ports on the SOHC head are fine, its the exhaust ports that make the head suck so much. Oversizing the intake valves will throw the flow balance of the head off. Ideally, you want the exhaust ports to flow about 80% of the air the intake ports can flow. Remember, bigger isn't always better.

I would also recommend using a DOHC Mopar PCM, as you will be able to take advantage of the extra revs and timing advance.
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Erays3r
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Post by Erays3r » Wed Oct 17, 2007 9:22 pm

DOHCRT wrote:For the valves, only oversize the exhaust valves. The intake ports on the SOHC head are fine, its the exhaust ports that make the head suck so much. Oversizing the intake valves will throw the flow balance of the head off. Ideally, you want the exhaust ports to flow about 80% of the air the intake ports can flow. Remember, bigger isn't always better.

I would also recommend using a DOHC Mopar PCM, as you will be able to take advantage of the extra revs and timing advance.
Thanks for the heads up on the intake valves. Ive been trying to do as much reading as I possibly can on the subject , but as with most things , enough isnt enough :)

As for the DOHC pcm, wouldnt that cause me to run ridiculously rich?

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Post by wickedgoodneon » Wed Oct 17, 2007 10:33 pm

TomZ wrote: The Indy manifold may not be the best choice for a mild or non-boosted engine. Were I in your shoes, I'd sell the Indy and get a different intake manifold, Blackdog, AMM long runner or even a ported aluminum factory SOHC intake.
Why is that? casue knowing is half the battle.

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Post by Erays3r » Wed Oct 17, 2007 10:40 pm

wickedgoodneon wrote:
TomZ wrote: The Indy manifold may not be the best choice for a mild or non-boosted engine. Were I in your shoes, I'd sell the Indy and get a different intake manifold, Blackdog, AMM long runner or even a ported aluminum factory SOHC intake.
Why is that? casue knowing is half the battle.
I picked up a brand new indy for next to nothing so I figure Ill rock it for a little.Once I get everything tuned and I find that yes, it is indeed hurting me Ill take it off and go from there. I already have it so I really dont have much to lose.

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Post by DOHCRT » Wed Oct 17, 2007 10:56 pm

Erays3r wrote:As for the DOHC pcm, wouldnt that cause me to run ridiculously rich?
It wont be as rich as you think with the mods you are making. If it is a little rich, I would invest in an SAFC.
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Post by chipdogg » Thu Oct 18, 2007 1:39 pm

Your head will go out tomorrow.

And I'm currently running a stock 95 SOHC on a 96 DOHC PCM. 32ish mpg and right around 16.0 1/4 mile time.
'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?

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Post by Erays3r » Wed Oct 24, 2007 12:04 am

Got my retainers and valves on thursday/friday of last week, just waiting on the head , cam/ gear now. Id take some pics of said parts but they really arent that exciting. Once Everything is assembled Ill get a pic :)

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Post by Erays3r » Fri Dec 07, 2007 1:22 pm

Unfortuatly I believe I may have bad rings, not getting any smoke at startup but I am burning oil. I still need to do a compression check and leak down test to confirm exactly what the issue at hand is. So between that and the Xmas just about here things have been put on hold.

After the first of the year , rather than get the car painted as I wanted. Ill have to wait till march/april for body work. A bottom end rebuild is going to take place. I dont want to throw a shit ton of money at the engine, so Ill prob go with a SOHC rebuild kit w/DOHC pistons from mizuno on ebay.

So when its all said and done Ill have a new engine thats a bit more peppy then its currently at , and also good for the next 100k

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Post by chipdogg » Fri Dec 07, 2007 1:58 pm

Could also be valve stem seals, which will get replaced anyways :)
'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?

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Erays3r
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Post by Erays3r » Fri Dec 07, 2007 4:47 pm

chipdogg wrote:Could also be valve stem seals, which will get replaced anyways :)
Im hoping thats the issue , cause I already have the parts I need to fix that :)

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Post by chipdogg » Fri Dec 07, 2007 5:33 pm

Well I hoped you would, if you have the springs out, might as well put in new seals. I just put new ones in the spare head I have today. Keepers are a bitch to put in BTW.
'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?

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