3.0 Build Project: "Green Machine"

[turbovanman²]

I'd keep the a/c but that's just me,

[MC#4]

Got my heads ported today. I didn't get real crazy with them, I hit em with a carbide cutter and then 60/120 dremel sanding bands. I just did the intake side. Probably have 6-7 hours in the pair. As long as the machine shop doesn't find any cracks they'll be good to go.

[Sundance 6g72]

nice. would be cool to see flow numbers for before and after.. i know porting shouldnt just be DONE but im about to do it to my spare set as well. DGAF additude

[MC#4]

Flow numbers would be interesting. I wouldn't know how to use/read a flowbench if I had one though! I'm more interested in 1/4 mile times. I did alot of reading before I started, but in the end I just went into it with the attitude of "Think Smooooth" if that makes any sense.

[turbovanman²]

Looks good.

Whats the exhaust look like?

[RoadWarrior222]

Yeah, you can think like an air molecule and figure "What am I gonna slam into first?" .... or imagine it's like a stadium or arena exit that a crowd is rushing out of and figure the bits that you don't want to touch, like door posts you might get slammed into, or dead space you might get trapped in etc.

However, you should also consider "total path" meaning, where is the air coming from, what direction it is heading when it enters the port from the lower intake and try to give it an easy a line as possible from there.

---------- Post added at 06:32 AM ---------- Previous post was at 06:32 AM ----------

you can also sort of check it by blasting water into it and seeing what it does.

[MC#4]

Looks good.

Whats the exhaust look like?

If you mean exhaust ports, I didn't touch them. Old posts all say our exhaust ports are too big from factory. They are so short, I'm not sure there is much to gain with basic PNP. If you mean actual exhaust, Its factory ATM with a gutted cat. I have 1.5"/3.0" mandrel bent pipe laying here, I just have to weld it all up.

[c2xejk]

The exits are too big. The port itself can benifit from a lot of work. Just don't touch the short-side radius! I have never seen a gain there and usually a lose. Raise the roof some.

[Vigo]

I just ran 15.2@88 in my dynasty on Wednesday with very little mods and certainly no nitrous. Hopefully you will find your missing power at some point while assembling the next setup. Best of luck.

[MC#4]

Must be nice living down south. The track here is closed Nov 1st to April 1st. Sounds like a damn good time for your dynasty. I'm convinced that my headgasket has been leaking for a while espcially after seeing how deterioriated the gasket is. I really can't wait to run this year. I'm hoping to hit high 12's with my Stealth and 13's would be awesome for the Shadow. I've got some big ol' nitrous jets so I think I can make it happen!

[turbovanman²]

Ditto, our season is April/May to Oct, but mostly its June to Sep, weather is too iffy otherwise,

[Vigo]

Low 13s should be a sure thing with a good running motor and the right amount of nitrous!

Texas is nice right now.. in the winter.. only 60-70f..

But once march and april come around we hit triple digits and by june it's triple digits every day for ~60 days straight. Which SUCKS.

[turbovanman²]

I could do with some triple digits right now, this freezing shitt is for the birds,

[MC#4]

I made myself some 1/2" Delrin Plenum Spacers today! I grabbed a scrap piece on ebay for $20 and went to town. Took about 3 hrs ea. but I'm pretty happy with em. I made a thread on the other site with more info on these. It's in the 3.0 section.





Also got my fan relocated to the front for more header clearance. Its a PITA with a P-body. I had to rework the rad support bracket and grind away at the fan shroud and the back of my grille to make it fit.

[Vigo]

Those are some nice looking spacers.. good work!

[RoadWarrior222]

Yup, awesome.

Never seen white Delrin before though I was thinking it only came in turd brown or black

[Sundance 6g72]

delrin can be dyed certain colors too.

I like the spacers. With the fan on the otherside.. how do you get it to push air instead of pulling?

[c2xejk]

Pusher fans are not as efficient as puller fans. If he wants that fan to be effective he will need to build a shroud for it. He might want to go to a junkyard and get a smaller fan that can be mounted right on the radiator. The one I used on my came from a '91 minivan.

[MC#4]

Yeah I'm not sure exactly how well that fan will work as it sits. I have this car is a million pieces right now, so I'm just getting things in relative order. If I have trouble with temperature, I'll pull the grille and build a shroud around it, no big deal there. Thanks for the tips Ed.

[RoadWarrior222]

Pusher fans are not as efficient as puller fans. If he wants that fan to be effective he will need to build a shroud for it. He might want to go to a junkyard and get a smaller fan that can be mounted right on the radiator. The one I used on my came from a '91 minivan.

I was about to dispute you on that, since fans develop basically no static pressure, so can never "suck" per-se ...BUT the important thing here is where the airflow is... Due to the rotation, a fan basically sucks near the hub and blows out round the rim. Ergo on a rad in pusher mode it develops good airflow only for a ring around the edges of the rad, in puller mode, it develops airflow right in the middle... Also a pusher would be more prone to recirculating a donut of air, due to low pressure in the center of it... on the airflow side, whereas the puller, the airflow has got a start in the center already... sort of.

Anyhoo... if you want a pusher setup, then twin pushers may work better, since then where they sit next to each other you'll get airflow through the middle of the rad at least.