Zepher

iTrader: (1)

Had the car dyno'd yesterday just to see how much/little power I had in my little 305.
Only real mods are Shorty Headers, K&N Air filter, Custom y-pipe (y's behind the trans), stock I pipe, Borla rear section.





here is the vid of the 3rd run,
http://www.transamws6.com/video/formula-dyno.wmv

fire350tpi

Sweet

1MeanZ

iTrader: (9)

interesting results. That tells me a couple things. The stock TPI intake is not that much of a restriction on a 305 because you dont really have that much more power than a TPI 305 with the same mods. The 2nd thing it tells me is that you need to slap a cam and some L98 heads on that thing and you will have a mean little engine! I would like to see what my 305 would do with a better intake on it. I bet you could make the same power that the guys like mw66nova are making with the HSR on a heathy 305.

Zepher

iTrader: (1)

I've got a set of 86 Vette aluminum heads waiting to go on and from what I read is that it won't really give me any more power over the stock TPI 305 heads, I am just using them for weight savings.
I am debating on putting a cam in with the heads or just put the heads on and wait till I find a 350 engine. I am kinda poor at the moment and can't toss too much cash at the car right now.

Oh, and the car was an Auto, so it has the 195hp motor and not the 215hp that a normal LB9 T5 car had and I am running a stock Automatic 89 ARAP Prom in the car with VATS disabled. someone mentioned that the T5 prom would have more aggressive tuning in it.

1MeanZ

iTrader: (9)

well you have the crappy automatic peanut cam too which is why I suggested a cam. 195hp at the wheels with a peanut cam isn't too bad though. You do have the early AL vette heads without the improved exhaust ports. I realize many people have said that the L98 heads will not help power much but I increased my trap speed by 4mph by swapping my heads only. Then once I threw my automatic trans in the dumpster where it belongs I picked up another 2mph. My point is, I think the AL heads helped my car quite a bit, For the record Willie experienced the same gains I did way back years ago when he did the swap on his car, in fact, his encouragement is why I went with the L98 heads. I dont know of anyone making 300hp at the crank or trapping at 100+ mph that are running stock unported heads, not even TunedPort335. I did nothing but gasket match my L98 heads and bolted them on and am trapping 100.5, seems to me that they flow better than stock 416s....

mw66nova

iTrader: (13)

um...i went 103.3mph with a set of 416's with stock ports. only thing done to them performance wise was a backcut was put on the valves.

and for the record, the only thing done to the 113 heads is a backcut and a MILD bowl blend. still has stock runners as well...been 108.48mph

it's possible...

Grim Reaper

Congrats, 195RWHP is pretty darn good for a basically stock 305.

If you are swapping the heads, most definitely put in a cam. As you have an HSR, the LT4 Hot Cam would be a great match. It will give you a nice lopey sound but still be quite streetable.

AND, make sure you go to DIY Prom and start learning how to tune your own eprom. You may even want to start doing that now BEFORE any changes. Then you could do a follow up dyno run to 1) Help tune the engine with a WB reading and 2) Document the power increase for tuning alone.

1MeanZ

iTrader: (9)

mw66nova I did not realize you had went that fast on the stock heads. I thought you had the L98s at that time. It should also be said that your car is very light and you have a pretty dedicated drag setup. I dont think anyone else has been near that fast on unmodified 416s. interesting..... Do you think you could trap 108 with the 416s back on? Do you think the L98s are better or did you just put them on for weight savings?

mw66nova

iTrader: (13)

it's hard to say as i've done a little work to the bowl area on the 113's. i do however, think that the 1.94 intake valve is a tad too large and kinda wished i could run a 1.9 or 1.88 as i think the larger valve is slowing the air down between it and the cylinder wall. Stock Eliminator guys are limited to stock size valves with no port work and most are trapping in the 116-120mph range.

iansane

iTrader: (1)

http://amd.streamload.com/iansane/Ho...rd/dyno073.jpg

HSR, Heddmen LTs, and LT1 cam. No tuning whatsoever. Haven't even turned off the EGR yet.

236hp and 253tq

matt_p

link no work

Fast355

iTrader: (2)

Keep in mind that the latest ZZ4 castings are an improved version of the 463. They have incredible flow compared to the 113s. My stock ZZ4 castings flowed what the LPE L98 heads flowed back in the day. The ports are very clean as cast, etc. If you can get on a set of 463 castings from a late 2004ish up ZZ4, jump on them.

423 FWHP from a 305, sanding rolls for minor port cleanup, a little bowl work around the guides, stock valves.

1MeanZ

iTrader: (9)

Fast355, 423 crank hp is amazing for a 305. What cam, what compressions, what RPM? Is this TPI, TBI, or carb? I noticed in HOTROD magazine that there are now forged pistons available for 305s....

IROCZ4BD3

iTrader: (4)

My 305 TPI with stock ported heads,210-215,499/499 cam pulled 195 hp at the dyno last time I took it