Ok, this is what I have to work with:



It's a 1969 Chevy 350, stock as far as I've been told and can tell. I'm picking up some Trick Flow Twisted Wedge G2 heads with either 1.5 or 1.6 roller rockers. This will be topped off with the stock 1988 Chevy TPI setup off my LB9.

Now for the questions!

Will those heads work well with the block and intake?
What rockers should I use; the 1.5's or the 1.6's?
Will my EPROM work OK with this? It's the Hypertech Stage 2 chip.

Lastly, what cam should I run that will work well with all of this?

Thanks again everyone. I know I have asked so many questions about this, but I really want to get it right! And not knowing much about engine combinations doesn't help lol

 

To answer your question with another question.
Why twisted wedge heads?
And why TPI intake?
It seems like those two ingredients of your recipe don't compliment one another very well.
Will they work?
If the bolt pattern is the same, sure you could put the parts on your block and it would run.
It seems like just about the range that those heads are starting to wake up, the intake would be running out of steam though.

 

Ok, well, this is what I wanted to know!

The reason for the heads is I can get them with the roller rockers for $700. I've always wanted some aluminum heads (bragging rights as well among friends lol), and these were 1/2 the price!

 

That seems like a great deal on those heads if they're in good shape.
The intake you should be looking at would be anything besides the stock TPI. But if the TPI is something you already have, all is not lost, you can upgrade it to something better when you have the money, if cost is an issue.
If cost isn't an issue, then buy a Miniram.
Suggestion: Do some searches on the twisted wedge heads, I seem to remember reading that guys had some complications with those.

 

The Twisted wedge heads, when they first came out, were in need of some improvements. Cast valve guides gotta go. Shorter valves, that cannot be replaced with anything other than Trickflows. Cams over .540 lift is a no-no. The G2s I believe had the needed improvements made to them. These were my personal experiences from my old 357 engine 2 1/2 years ago. After 3 spring dampers let go, and using 1.6 roller rockers, which caused some guide wear right from the get-go, after the for-mentioned were corrected, the heads were fine.

 

So if I do go with them, I should use the 1.6 rockers? I have no idea what cam I'm using, that was actually one of the questions I had for this combo!

So, if I assemle this motor, it will work, but not optimally? I could do this till I got my TPiS big mouth intake and runners, then find someone to burn me a chip, right?

So many questions! lol

 

The cam would depend upon what your final decision is regarding the intake.
Will it be flat tappet? Or roller retrofit?
Why do you want a get a big mouth/ LTR when you could get a miniram for the same price?

 

It would probably be a stock replacement cam, whatever slides back in where the stock one came out!

Now, what's the deal with the mini-ram? Would that be a better idea?

So now I have a problem. I can't assemble the motor till I get the new intake, as I really don't want to be buying and installing 2 cams!

But, what cam would be good if I was to keep the stock TPI setup with this?

 

Minirams are the best. Wish I could have one.
The books that TPIS sells have some good dyno info on the Miniram vs LTR.
The big mouth LTR is a lot better than the stock piece, but the Miniram is the real heavy hitter.
Even with a small cam the miniram would give you better top end than a big cam with the LTR system.
There are some good threads on the miniram, a search would reveal some useful info.

 

Look like forged pistons in that bad boy. Don't assume anything in the cam department. To use the computer you'll need a cam that will work with it. A very mild cam with the 1.6 rockers and those heads should run pretty darn good if the intake system is halfway close to right.

 

What do you mean? Forged pistons bad? Think the cam isn't stock? Doesn't matter, no idea what it is anyway! Plus, this thing had smogger heads, an old Edelbrock intake, and an older Holley when I got it, so the cam is no good for me.

So, this setup with a mild cam would be decent... that's good news! What do you mean by the intake though? As in, not stock?

 

he didn't say forged pistons are bad he called the engine"bad boy" and said it looked like thier were forged pistons in thier. but thier saying you should get the minni ram intake then use the rest of your tpi stuff with it the your twisted wedge heads and a mild cam. and you;ll be set

 

http://stealthram.com/intakecompare.html

 

How do I go about setting the spring pressure for a flat tappet cam? I don't know what the TF heads were one previously, so I should probably check this, right?

 

Ok, after checking that out, I think the HSR is best... but I still now have the problem of burning an EPROM. There is no way I can do it, and some places seem to charge TONS for one!

Also, so when I check his link for what it cost him to do the swap, all I do is buy those things and I'm all set?

Lastly, the 350, TF heads, 1.5 rockers, and HSR will be a good combo?

If so, time to break out the credit card!

 

Whoops, almost forgot!

I still need a cam reccommendation for the above setup I have chosen. Also, what lifters and pushrods should I get for this?

And do I have to get a specific oil pan for a Camaro, or will any work? This one is ugly!

Do the TF heads use centerbold covers or the older style? Would I need tall or short?

Thanks for putting up with all the questions, I'm sure everyone here had many on their first build too!

 

Man! You have a lot of questions!
The HSR is a good choice.
What are the smog laws like where you are?

Cam for the HSR + TF G2 heads... lemmee see... flat tappet...

Let me finish my coffee first.

Yeah your oil pan's ugly, no big deal, you probably ought to take that engine apart though, and at the very least put some rod bolts in there. Along with some rings and bearings.

One idea might be to get a pretty small cam that would work with your stock chip, because it sounds like you're going to have your hands full with the mods that you're already doing.
Then you could learn to burn your own chips, and when you get that part down, you could upgrade the cam.
A cam like the Comp XE 256H might be one such cam.

Not really sure about being able to use the factory chip with those mods, but it might work til you can make a better one.

 

Smog laws... forgot about those. Is the HSR emissions legal? If not, screw it, I've found ways before! lol

Forget about the stock chip. I'll just go for the custom-burnt one. So with that in mind, what cam now?

 

Possibly the Comp XE 262 or 268, or the Crane equivalent.

 

This one? http://store.summitracing.com/defaul...=KeywordSearch

 

I'd guess that one would be good.
There might be other choices that would be better.
I can't say for sure tho, because I don't have the combo that you're trying to work with.
But if I did, that cam would be one that I might buy.

 

BUMP

Any other opinions? I was hoping someone else had a combo like this!!

BTW, thanks for all the help!!!

 

As mentioned the G1 heads had some problems, mainly associated with the K-Motion springs that came on them stock. The guides were a problem if the geometry was off the least bit also. The G2s you're asking about were revised to lessen the load on the guides and TFS stopped using the K-Motion springs. First, you're still going to be limited by the amount of lift you can run on the cam. The fast rate of rise cams generally have a better lift to duration ratio, and this is what you'll want in a flat-tappet hydraulic cam.

I'd recommend the 270 magnum (224/224 -110) and running the 1.6 rockers (for .501/.501 lift) for the G2s and a modified TPI with a good exhaust system. You need to have the springs checked to make sure they're OK to use with the cam or better yet get new springs since you don't know if they were abused or not.

I ran high 12s at almost 110 mph in 90 degree temps,,, blowing ET Streets off the rims with a similar set up and fully ported GM TPI base and plenum with a set of SLP runners with the divider cut back to about the half way point. That was through a modified MAF sensor running a stock 350 chip, 24# SVO injectors, and the fuel pressure at 42psi.

I like the HSR, but it is about as much intake as you can throw at a relatively mild street 350 with 3.42 or less gears and less than a 2800 stall - meaning that you won't see much gain with it over a modified TPI unless you go with more gear and more converter. Plus, the modified TPI is emmissions legal.

Hope that helps.

 

Wow! Sounds like I'm going for it! haha

Ok, I thik I have everything I need to know to start on this. Time to get ordering!

I already have a set of Hooker 2055's and a 3" y-pipe on the way. Hope those work out well.

So should I search for a stock 350 chip?

I have the T5 now... I might want to think about ditching that!

 

Also, you said 24# SVO injectors... what exactly are those? Is that a brand? I couldn't find them!

I was looking at the Accel ones... any experience?

lol gawd I sound like a newb!

 

SVO is the Ford injectors. The 5-speed throws a little twist on things - there is no stock 350 chip for those. You could run your 305 chhip and injectors and jack the fuel pressure on up as a stop gap until you can get a chip burned. To do this right you would need 24 - 26# injectors and chip burning equipment to burn your own. A good starting point chip would be the 88 305 5-speed chip you have now with no more than an injector change constant. I'd recommend going with a 23# constant if you go with the recommended cam, intake, and the SVO injectors. Check out the DYI board for info on chip burning. Just as an FYI,, you'll probably get more replies on TPI questions on the TPI board also.

 

Will the stock Camaro intake setup work with the HSR? It looks taller...

Also, all my stock things will bolt up to those heads and intake, right?

Should I invest in a 52mm throttle body?

 

Yes and yes. Connect the MAF to the air intake, connect the boot to the MAF,, then connect the boot to the T/B,,,, then pull the assembly toward the lower portion of the assembly and lock in place. You'll have a hard time attaching the boot to the T/B with the assembly locked in place.

Also, all my stock things will bolt up to those heads and intake, right?
Yep

Should I invest in a 52mm throttle body?
I'd just run the 47 and an air foil,, or go 58mm.

 

Ok, which cam am I looking for?

Hydraulic flat tappet
Hydraulic roller tappet
Mechanical flat tappet
Mechanical roller tappet

If I go with the Comp Cams 270 magnum (224/224 -110)

 

well that was my first rebuild...
my stock l98 --> got the first gen twisted wedge head with crane gold 1.5 and a comp cam 450 480 206 211 at 112 with the stock tpi induction stock injectors no custom chip (just a piggie back jet chip which was for free other wise custom would have realy helped) msd 6a/dissy/coil 9.87:1 comp
let me tell you my set up made some nice low end torque
that combo of parts a well built 700r4 (after blowing it twice!)and a 9bolt 3.27 in the rear allowed my to toast brand new ss camaros (shows you how long ago that build was!), some model corvettes and, mustangs like no other (even my arch nemesis mustang with 3.73 gears stronger clutch full suspension etc etc) but other than that for my first rebuild i was definately a happy man