trautman87

Hi!

Been a member for a while but have not needed to make any posts due to all the good ones that is here

Now here is the deal: My 305 has seen better days so I am building a new 350 instead of overhaulin the 305. I have a pretty small budget so when I found this 350 with vortec heads on summit i was suprised. I would get an engine much cheaper then building it myself.

So I am wondering if the cam and heads on this engine would work with a ported TPI with SLP runners? http://www.summitracing.com/parts/NAL-19210007

I already got a Edelbrock TPI base for vortec heads i got from a friend and thats why I am using TPI. The wife wont allow a HSR this year

With a tune, would the cam match and would I be able to reach at least 300hp?

Hoping for your help!

yaj15

iTrader: (3)

Yeah that could work. You already have the vortech style intake. Do you have to worry about emissions? I don't think any of G.M.'s gen 1 style small blocks have the exhaust gas cross over built in to them like the stock camaro and firebird LB9 and L98 engine cylinder heads do.

You could get one of the G.M. partial short blocks and put in your own heads and cam.

You could also use the Corvette style exhaust gas cross over. The L98 corvette engines had an external cross over.

You will also want to get a tune and a chip that is based off of the L98 to get the most out of your new set up. The LB9's have 19 pound per hour injectors and the L98's have 22 pound per hour injectors stock. They also have a different knock sensor so you are going to want to change that to when you get the new 350.

With a tune, some airbox intake mods, the aftermarket TPI you have and full exhaust (from the headers on back) you should be able to get close to or meet your horsepower goal.

VincentZ28

iTrader: (2)

The cam in that engine is smaller than the stock L98 cam. You could reuse you current stock cam or upgrade to the ZZ4 cam. Port the heads, manifold and runners. You will have a nice 320whp 350 with Dyno Don headers and 3in dual catback system. Trust me! We did this combo before and seen the Dyno numbers.

trautman87

Sounds good then!

Since my car is imported to Sweden before 1989 special laws apply so the only emission testing is that I must have a cat, but it does not need to work Already got headers, air intake mod and a cat-back, also my cat is empty.

The knock sensor I knew about already. So you think It would be best to start with a L98 chip/tune? Got a few guys in Sweden who they say are pretty good at tuning, would it not be better to have them make a custom chip for my setup to start with?

For a while I thought about a shortblock and to get another cam and heads but its so many other things you need to get as well. This seems to be the best bang for the buck. So since you think the cam should work I am really considering this setup.

Btw, sorry for my bad english. I hope you can understand what I am typing

yaj15

iTrader: (3)

Thats cool! I wish my emissions testing was only a visual cat converter check. I live in California and make you jump through hoops with emissions tests.

Ask around on the board about people or companies that can do a good tune. The programming section forum here can help you out a lot with that.

Have you seen other cars that your friends tuned? Can you trust them? Do they do good work? See what other cars they have worked on and see how they turned out.

The L98 chip would be your best bet as a starting point. The fuel and ignition timing curves should be different. Are you running a mass air flow (maf) style TPI set up or the speed density type?

While you have the engine out, now would be a good time to go through the rest of the drivetrain. Think about upgrading the trans and the rear end at the same time too.

ASE doc

Just an FYI. All OE manufacturers have used the exhaust crossover for as long as I can remember. Long before EGR was even a bad dream in some engineer's mind, they used the exhaust crossover to heat the manifold's "hot bed" to improve fuel atomization in carbureted and TBI applications. Only on dedicated race heads, , where maintaining a cold, dense air charge takes precedence over drivability, or on special builds like the Vette where an alternate method for routing EGR gas was used in order again to cool the inlet air charge, were the crossovers deleted.

yaj15

iTrader: (3)

Thats good information thanks. At some point I want to put a set of heads on my car. I live in California so I have to deal with the smog police and they will kick you for every little thing they can.

ASE doc

Fortunately for you, several have blazed this trail before and show us how to make very impressive power while still flying under CARB's radar. I don't have to deal with DEQ at my address but I still want my car to run clean and efficiently, even while it makes its awesome power.

trautman87

Isnt the zz4 a roller? I dont think its a roller block on that engine and the reson im thinking of buying it is that I dont have the time, tools and money to build me an engine from scratch. But you guys think it would work with that 350 crate and if I buy another cam and install before I drop it in the car?

About the tuning we got a few guys here with good reputation who has done really nice engines with TPI ECM:s.

Already got a reinforced th700r4 tranny and I will buy a overhaul kit and a new gear set for the 9bolt from 9bolt.com.

I just dont wanna buy a engine that wont work with my TPI.

yaj15

iTrader: (3)

ZZ4 Crate Engine - http://www.summitracing.com/parts/NAL-24502609/

ZZ4 short block - http://www.summitracing.com/parts/NAL-12561723/

The ZZ4 is a roller style '87-up 1 piece rear main seal block. It is basically a hopped up version of the Corvette style L98 engines that were used from '85 - '91. Its got a little bigger roller cam than stock and the L98 Corvette aluminum heads. You are going to want to do some intake mods to get the most out of that engine.

trautman87

I have been checking out the zz4 block before. My thoughts were abaout the zz4 cam. I think i still will go with the 350 vortec crate but change the cam to get a little more where I want it. I just read in a smallblock performance book about an 350 with portet stock TPI intake where they used a cam with 230/230 duration @ 50. But that sounds like a bit too much for my set up??

ASE doc

A ported TPI intake should make good use of the ZZ4 engine's capabilities. I run a much larger cam that the ZZ4 with larger heads and ported high flow TPI intake. While I have a slightly lopey idle, I have very good drivability and excellent power.

trautman87

Looked around att summit for all the parts I need and found this:http://www.summitracing.com/parts/WND-7542

It costs the same as new runners so im really thinking of getting this instead. I am a bit confused though. Will it work with stock fuel rails and my AFPR? On suggested parts there is Holley fuel rails but I selected stock when I searched around.

Think it would run even better with this intake unstead of porting my plenum and getting siamesed runners? I think so but I am no expert.

ASE doc

That's a Stealth Ram. It is a good choice but you will need the injector rails that go with it. You will definitely want to have your ECM retuned to make use of that intake.

ninetyone

iTrader: (2)

You may need to upgrade the springs in those heads if you use a ZZ4 cam. Check the max lift on those heads first.

Michael Collins

I am trying to get price on my Eldabrock tune port injection set up. Its crome and has a b&m eldabroke fuel injection carb. it has a new zz4 350 long body crate engine. I bought my 1986 iroc-z Z-28 Chevey Camaro at a auction. It is tricked to the max. including super chip programmer, roll cage, 373 Detroit lockers, B&M slap 700r4 rebuilt trans with shift kit, 3" alum driveshaft, k&n cold air, New matalic black paint, HotChiks Pro package sway and shocks underneath, Hotchiks slotted brakes system, Hotchiks tracktion bars, kill switch, battier is set up in the trunk, AC, crusie control, and much more that I am finding out by the day. It has 70,000 miles on body and the inside of the car looks like new of the lot cars. Its really hard for me to sell this car without knowing what its worth. If anyone can help me with some part prices and more info on my car. Please free to contact me by email at wildcat258408@gmail.com Thanks, Michael

Tuned Performance

iTrader: (92)

Bob88GTA

iTrader: (2)

yaj15......what route did you go on this?

yaj15

iTrader: (3)

What I did on my car is stick with a factory style long tube runner TPI set up.

I've got a 3'' Flowmaster cat back exhaust, high flow 3'' cat, hooker 1 5/8'' headers with a 3'' y-pipe. On the intake side I cut out all the baffles and put in Hawks thirdgen ram air boxes. I've also got a 52mm BBK throttle body, ported plenum, ported SLP intake runners, and ported Edelbrock base. I've also got a full MSD ignition set up.

I'm still running the factory L98 long block. It performs really well for a full bolt on car. I've got over 400 foot pounds of torque and probably a little over 300 horse power.

Bob88GTA

iTrader: (2)

Thanks a bunch yaj15......I'm think'n!

Bigfoottpi11

Where did you dyno this?