hi
Just finished installing my compeng 10point cage but there is something that bothers me a little. the two cross/diaganal braces that go from main hoop todown to sub connectors are cut at an extream angle( at upper cage sec ) so im unalble to weld the lower portion which is about quarter inch worth of weld. Does anyone know it will pass a tech inspection/ cage cert?

 

Get some corner gussets and weld them in. Most tech inspectors will allow the gussets for extra weld if a complete weld around the tube isn't possible.

Nothing saying it still won't pass a tech inspection but it will help.

 

Usually an 1/8 - 1/4 is acceptable from what I've seen.

Jessie

 

You could also weld (you CAN'T do this on the main hoops) a bigger tube over the one you have and use that to make up the space.

 

What kind of material are you using for the rollcage?

 

hi guys thanks for the replies
to answer the latest question first its, 1 5/8in mild steel comp eng 10point cage.
i managed to get a little more weld in the lower portion, so i would say only a eighth inch is not welded, maybe if i tiged the cage it would have been possible to weld completely.
stephen, i had asked you a question on another board, but never got a reply, you may have not read it. lets try again please. with the old 383 you had what heads were on it (cast number) and did you ever flow them, if so what did they flow.
thanks
if anyone wants to see pics im trying to scan them, ill post at a later date.

 

If the spot is where I think it is, most tech inspectors will never even notice it. I think you are saying that the angle between the downtube of the hoop and the diagonal is too small to get a weld into???

As for certification, I have seen hundreds of them done, and little things like that seems to rely on who is doing the certification...

 

Never saw the post. I don't go into all the forums or read all the messages. Just not enough time in the day any more

Casting number is 370. They were listed as over the counter replacement heads for the 492. They have accessory bolt holes. I did hours of porting on them but never had them flowed. The ports are now huge. I had screw in studs installed, larger valves (2.02/1.60), valve guides cut down for more lift and positive lock seals and larger spring pockets cut. I still have them in my garage with a bunch of bent valves still in them. Some day when I decide to assemble the 400 block sitting in the corner, I was going to get new valves installed and drop them onto that. I'd never be able to sell them to get back what I put into them. As an off the top of my head number, I'd want $800 CAD for the 2 heads as bare castings. That would cover the majority of all the machine work that went into them. You could probably buy a set of Darts for less than that.

 

Phil you hit the nail on the head thats exactly what/where im talking about.
Stephen, thanks the reason i ask is because i have a set of over the counter "292" which im almost done porting, I have seen alot of people run great numbers with these heads however never found any info on them and or flow numbers> I keep hearing they were the bowtie prototype. I though maybe by fluke chance thats what they were looking at you mph.
thanks

 

A set of World Products iron heads would be a good head too. About the best bang for the buck on a race engine. A buddy of mine had a set on his 409 alcohol motor in his '92 Firebird running 8.90s in the 1/4. That car's a 28.1C chassis certified to run 6s, so he's barely even pushing it hard with the small block, which made an estimated 750 HP at 8,000 RPM. Next up is a 632 BBC. I don't think high 7s are far away.

 

tko
do you know which "darts" he is using. The motor going in the car most likely this summer is going to be a "sacraficial one" a la nitrous however im also building one along side of it to be a blower or turbo, not sure which one. Nitrous around here is very expensive @ $8 per pound 2-3 pounds per run, buy the end of the year you have paid for a alternative method which does not require filling. In other words finish car first and run what i have or build a killer motor to dazal my engine stand instead

 

$8 a lb!?!?! where are you located at?

still under $4 in my corner of the galaxy...

 

I haven't bought NOS for a few years now. The last time I bought it the price was $5.35/pound CAD.

2-3 pounds per run!! Maybe if you were using a 400hp 2 stage kit. I have a 10 pound bottle in my truck. Hitting the NOS off the line I can make 8-10 full 1/4 mile passes. Makes a 15.0, 4600 pound truck run mid to low 13's

 

definetly look into the darts, the 200cc iron eagles are great heads. i am going to be running them on my next motor.

 

Phil -im in toronto n20 is anywhere from $7-8 per pound and dont forget the 15% tax
stephen- well id figure between 2-3 pound on a 250-300 shot including a purge
66nova - looking into the 215eagles or pro 1 aluminum 215 but cant find flow numbers would love to know what vcjurs flow stock

 

I'm not sure what heads he's running. I will ask him the next time I see him, but he may not even know. He doesn't know that much about the engine. I think he bought it assembled from a guy who never ran it. It originally went into his Nova and had that car in the 10s. Then he stumbled upon a rolling chassis '92 Firebird for $3,500. The car's a full tube frame certified to run mid 6s. It has a Mark Willimas modular 9" rear. Everything was already done, and literally all it needed was an engine and trans. There must have been $20,000 tied up in the thing, maybe more. He sold the Nova as a roller and dropped the engine and trans into the Firebird. Off the bat he ran high 9s. Eventually he got it down to 8.90s using alcohol injection. The car is dead consistent too. He bracket races it and often makes money with the car.

I tore down the motor for him when it failed. Four cracks in the deck, and three cylinders filled with water. A lovely milkshake of oil and water came out of the pan (it's always shocking when you pull the drain plug and clear stuff comes out for the first ten seconds). The shortblock was stock 400 4-bolt using Eagle crank and rods hooked to Probe pistons. Studs in the mains and heads. It had a solid roller cam, which helped it push 8,000+ through the traps. I didn't really pay too much attention to the heads when I took them off. I knew they weren't the problem, so I just pulled them and set them on the bench. Then we saw that it wasn't just a blown head gasket and got pretty discouraged.

He bought another block and rebuilt the engine, and ran it for about 10 passes. Now he's trying to sell it because he's got a 632 BBC that he's working on. Should push the car into the 7s easily. The small block is for sale if anyone's interested. He's looking to get $6,500 for it with the trans and converter. It's complete from injection unit to pan, with headers. Trans is a glide with a 5,500 stall 8" converter. Judging by his times I'd say it makes about 700 horses.