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Ozz1967 07-06-2008 09:59 PM

My engine Build
 
Hey guys,

I just finished installing a new 355 in my 84 T/A and I wanted to get your opinions on my build and how you think it'll work once I get it started. The desktop dyno at the enigine shop showed a peak of 315hp and 415lb-ft of torque at 5200rpm or thereabouts.

The car itself is an 84 Pontiac Trans am with a built 700R4 and 3.73 rear gears.

The block is a 1996 4-bolt main from a Silverado bored .040 to clean up the mess of the previous owner running it out of oil. It's been hot-tanked, magnafluxed, alignhoned and decked (can't remember what he decked it too and can't find my spec sheet at the moment).

--Scat cast Crank and Forged I-beam rods
--Pistons are 9.2:1 dished Hypereutectic (sorry, forgot the brand)
--Lunati Voodoo 60121 Cam w. .515 Intake and .530 exhaust. Advertised Duration of 270/278, Duration at .050 lift of 219/227.
--Comp Cams Pro Magnum 1.52 Roller Rockers
--Edelbrock Performer Intake
--World Sportsman II heads, 200cc runner volume with 66cc chambers, 2.02 intake and 1.60 exhaust ports.
--Rochester Q-jet 4bbl carb from Jet Performance Products
--Moroso 6qt Oil pan with high volume pump
--Jet-hot coated Hooker 2055 shorty headers and custom dual 2.5" exhaust running to Hooker Aerochamber mufflers.

If there is anything else you want to know about it please let me know but them's the nuts and bolts of the build. The engine is finally in the car and I'm hoping to finish plugging it all together this week and have it running by next weekend. Any and all comments welcome! Thanks!

C-10 07-07-2008 12:00 AM

Dished pistons... woulda went with Flat tops. (IMO)
Sportsman 2's good investment...
Q-Jet... OK, but I'd run a Holley HP series 750 vac. sec.
700 R4 with 3.73... Awesome. (hook up that TV cable for cryin out loud)
VooDoo's are a Hyd. flat tappet? If so, use Shell Rotella oil.

This T/A should move out. :thumbup:

techinspector1 07-07-2008 01:54 AM

I hope you bolted a loose converter onto the flexplate. If not, it's gonna be soggy on the bottom.

Ozz1967 07-07-2008 09:05 AM

Quote:

Originally Posted by C-10
Dished pistons... woulda went with Flat tops. (IMO)
Sportsman 2's good investment...
Q-Jet... OK, but I'd run a Holley HP series 750 vac. sec.
700 R4 with 3.73... Awesome. (hook up that TV cable for cryin out loud)
VooDoo's are a Hyd. flat tappet? If so, use Shell Rotella oil.

This T/A should move out. :thumbup:

:nono: This voodoo is a roller cam.

I also wanted to go with the dished to keep the compression down a bit in order to be able to rum pump gas. WIth the way it's still going up I dont want to "have" to run premium all the time.

Ozz1967 07-07-2008 09:25 AM

Quote:

Originally Posted by techinspector1
I hope you bolted a loose converter onto the flexplate. If not, it's gonna be soggy on the bottom.

Define "loose". You mean something like a 2500 stall or so?

techinspector1 07-07-2008 01:45 PM

Yeah, at least. You know you have too much of something when max torque is being made at "5200 or thereabouts". In your case, it's too much intake runner volume.

Ozz1967 07-07-2008 03:01 PM

Quote:

Originally Posted by techinspector1
Yeah, at least. You know you have too much of something when max torque is being made at "5200 or thereabouts". In your case, it's too much intake runner volume.

Well, I don't have the Dyno sheet in front of me and It peaked HP and Torque at right near 5200-5500RPM then started dropping off. Also, it was a very broad flat curve starting at 1500rpm (the lowest reading it would give us) I had 400 ft-lbs of torque with a peak of 415 or 420 (can't recally exactly). For an Auto Transmission I doubt I'll rarely ever see 5000 rpm unless I'm drag racing or running autocross and 400 ft-lbs from what is essentially "go", is pretty supreme if you ask me.

Barry.M 07-07-2008 04:32 PM

G'day Ozz1967.

I think your combo is well balanced for mid-range power :thumbup: . The only thing that I think that needs improvement (IMO) is the exhaust and maybe a 2000 rpm stall converter ?. Shorty headers look cool but don't flow much better than stock manifolds. I'd put a proper set of headers on it and "X" pipe hooked up to your dual exhaust. But it's something that you could change later.

Let us know how it goes once you've run it in.

Have fun............Barry.

glen242 07-07-2008 07:44 PM

Quote:

Originally Posted by C-10
Dished pistons... woulda went with Flat tops. (IMO)
Sportsman 2's good investment...
Q-Jet... OK, but I'd run a Holley HP series 750 vac. sec.
700 R4 with 3.73... Awesome. (hook up that TV cable for cryin out loud)
VooDoo's are a Hyd. flat tappet? If so, use Shell Rotella oil.

This T/A should move out. :thumbup:

Since December of 2007 there has been a new diesel oil standard, API CJ-4. You may still find the old standard (API CI -4) in some stores. The CJ-4 oil has reduced ZDDP and is really not recommended for flat tappet engines as the CI-4 was, with its over 0.010 Zinc and Phosphorus.

I would not use the CJ-4 oil in a flat tappet cam engine. Search the oil manufacturers web sites and look at their spec/product information sheets. Flat tappet cams, I believe, require at least 0.10 Zinc and Phosphorus to insure long cam lobe life, especially for new cam break in. ZDDP is what GM EOS, for break in, is all about.

I have used Valvoline VR1 oil since I built my 383, 3 years ago, running a CC XE274 without any problems.

Use any oil you like that you can find, with the required ZDDP, but the new CJ-4 Rotella ain't it.

Also, don't listen to the guys at the drive in. Go to the manufacturers web site for the ZDDP info. I have seen a lot of BS pasted on and posted. Do your own research.

It's your engine

Ozz1967 11-19-2013 05:36 PM

Quote:

Originally Posted by Barry.M (Post 992748)
G'day Ozz1967.

I think your combo is well balanced for mid-range power :thumbup: . The only thing that I think that needs improvement (IMO) is the exhaust and maybe a 2000 rpm stall converter ?. Shorty headers look cool but don't flow much better than stock manifolds. I'd put a proper set of headers on it and "X" pipe hooked up to your dual exhaust. But it's something that you could change later.

Let us know how it goes once you've run it in.

Have fun............Barry.

Well, wow, how time flies!

I got the motor in and "running" in mid 2009 but I had lots of issues getting it running right. I went through 3 sets of valve springs (Different valve spring broke on each set) before I replaced the whole Lunati set with a set from Comp but I had to have them "shimmed" to fit right? No issues since.

Anyway, using the factory Qjet with a rebuild on it I dynoed 238hp originally (I forgot the Torque) to the rear wheels. There was maybe 300 miles on the motor at this time. It has issues idling and running at lower RPMs.

Fast forward to 2010 and the military then shipped me to England. Enroute I bought a "new" Quadrajet from Cliff Ruggles at Cliffs High performance. He "Built" the carb using my engine/drivetrain specs. I got it installed and did a "rough" tune on it. In England I found a Pontiac specialist, Robin Grey at "AutoPontiac" in London who among other things Tuned the carb. She purred like a kitten after that. I was even able to take her when I went to Germany for military training. Yeah, 6 weeks and the Autobahn...what a trip!

Fast Forward now to 2013 and the Military brought me back to Utah. The motor now has 30000ish miles on it as the car was my daily driver in Europe and I had it Dynoed a few weeks back. It came back pushing 261hp and 281ft-lb of torque to the wheels.

Now, other than a few more miles and a properly built and tuned carb, I've done nothing and picked up 23hp!

The trasmission is now slipping so I'm getting a rebuild kit from Probuilt Autmatics in California and a Vigilante Torque Converter from Presision industries with a 2600rpm (estimated) stall. I can't wait to try these out.

Ozz1967 11-19-2013 05:49 PM

Quote:

Originally Posted by Barry.M (Post 992748)
G'day Ozz1967.

I think your combo is well balanced for mid-range power :thumbup: . The only thing that I think that needs improvement (IMO) is the exhaust and maybe a 2000 rpm stall converter ?. Shorty headers look cool but don't flow much better than stock manifolds. I'd put a proper set of headers on it and "X" pipe hooked up to your dual exhaust. But it's something that you could change later.

Let us know how it goes once you've run it in.

Have fun............Barry.

For the headers, with the Automatic transmission in an F-body car there is no room to run dual exhaust. It's also been tested that the single 3" only flows 5cfm or so less than a dual 2.5". Now, if I had a manual transmission there would be room and I would definitely run dual exhaust. :)

vinniekq2 11-19-2013 08:46 PM

dual 3 inch would be nice,,,

vinniekq2 11-19-2013 08:50 PM

Ozz,in your album? is that a 67 Camaro with 68 louvres or a 68 Camaro with 67 doors?

Ozz1967 11-20-2013 07:04 AM

Quote:

Originally Posted by vinniekq2 (Post 1923449)
Ozz,in your album? is that a 67 Camaro with 68 louvres or a 68 Camaro with 67 doors?

It's a 67 with a 68 hood on it.

I'm debating if I want to swap the hood out for a cowl induction sytle or leave the louvers since they're just for looks.

Ozz1967 11-20-2013 07:05 AM

Quote:

Originally Posted by vinniekq2 (Post 1923433)
dual 3 inch would be nice,,,

YA...if I had a manual transmission and a 427 or so! Otherwise that big of an exhaust is sort of a waste.


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