i just got the engine back in and i'm waiting for the chip right now. can't wait to drive it! but what kind of 1/4 times should i expect from this build. check out my sig. for mods. anyone w/ 305's w/ similar mods?

 

oh ya, the cam specs are 268/270 duration 477/480 lift
and the heads have 2.02/1.60 valves and i have an afpr now

 

i never knew you could put 202 valves on a 305 someone told me the clearancing was impossible. that is a lot of valve for that motor.

 

i am using stock ratio rocker arms, if i used 1.6 it would not clear.

 

You got the Comp 268XE too. I waiting to finish my install up. How does it idle in your 305?

Also, these kind of questions should be asked on the drag racing board.

 

it idles at 2k right now, it's just crazy, mostly becuase we left the stock computer in it to drive it to a performance shop that was do'n a chip and exhaust for me. so we never got it to idle right really. they are tuning it so i'll know shortly

 

Let us know! This sounds killer- A good 305/5spd runs mid 14's- so that should knockn a second off perhaps.

What did it run before?

 

i had never ran it before but i estimate 14.5's, I only had slp exhaust and nitto drag radials before and i lost to a subaru wrx byonly 2 car lenghts and i beat a 2001 stang gt converible, it was a close race. i race some of my other friends who have ran so i got an idea from that, it has to be around a 14.5, but now i have heads, cam, hooker headers and chip and all this **** so i'm hoping for some decent 13 sec time slips

 

Hehe keep ur beast away from me. 14.4 @ 94mph I ran stock yet you have 1LE so I would assume 14.2 @ 95mph or something near there. Expect low 13s if ur combo meshes well. Get some 3.73s now So when we meet up I know not to race you, damn you we woulda been a good race hehe. Oh well, so 2.02 valves cant use 1.6 RRs??? I was gonna do that, need more lift

 

By the way I just read your Long Tube headers...why may I ask u got those. Ur gonna ruin ur torque. You should get some shorties or something to increase backpressure. Its gonna flow pretty freely w/o a cat already. Oh well ull pick up some hp but lose on torque.

 

i had shorties, i'm sell'n em if u want em i just have seen good results from hooker so i went w/ those. i think overall i'll get way more power w/ long tubes, i have big valves and need to get that exhaust out quick and smoothly, the design of the shorties didn't look to good for that. i was run'n em open w/ no exhaust at all, it had a bit less torque barely noticeable, but massive high end power, throttle response at higher speeds was better too. wish i could run open headers and still have quiet exhaust!

about the 2.02 valves, it depends on the heads u have, i called edlebrock tech people about my heads and they were seriously dumbass's they didn't know if i could use 1.6 or not. they told me to buy em then hand crank it over and it it grinds and makes noises then tear em back out and buy 1.5's. i told him i didn't have the time to waste tearing the engine down twice just becuase they couldn't give me a straight answer. i was pissed and hung up on em. i know 2.02's will work w/ 1.6's but it is questionable w/ a sbc engine w/ my heads, i still don't know. so i went w/ 1.5's

also about the headers i am curious do u know from experience or seen testing on shorty headers vs. long tubes? i don't see how they can be better at all.

 

IMO, you have a great setup, but for the wrong engine. The valve is just waaaayy big for a 3.75" bore and I think the hooker long tube is also too much. My old setup consisted of a Comp 210/220 camshaft, stock ported TPI, stock corvette AL heads(1.94I, 1.50E), and SLP Tri-Y headers. Ran a best of 13.6's at 101mph. With such a small bore on a 305 it's a must to keep velociy up as it just doesn't breath hard at all. Adding the big heads with the larger valves and the large tube headers, I think your going to really hurt the torqe which is going to hurt your ET. Remember a 305 doesn't make a bunch of torque already. Then again, it may run like a scalded dog. However, it wouldn't surprise me if you don't even make it into the 13's. Good luck anyways!

 

the block is gonna be bored to like a 355 when i have the money for the bottom end to bebuilt. so it should be decent for now till it's a bigger bore, then those valves will really help

 

i may loose torque like ur say'n, but if it's flowing way better u have to gain hp, right? so u'd think the track times wouldn't be too bad. well if it sux at the track, next spring it should be a 350 block or my 305 bored out.

 

Long tubes are better "tuned" for torque than shorties. Also better for HP. The reason for shorties? So they'll fit in the chassis and the y-pipe can get the gases to the cat. Long tubes are "real" headers, shorties the next best thing.

We need an automatic slapping feature on this board for anyone who says backpressure is a good thing. Until then, consider yourself slapped.

The 2.02 valves are pretty much worthless on a 305 (even if they don't hit, they'll be shrouded). Perhaps when you get the 350 in...

 

i can see how w/ the 305 u get to a point where biger valves won't do any better, but i don't see how hav'n 2.02's will hurt my performance at all. all i know is i'd be pissed if it doesn't run good at the track becuase 2.02 valves are too big somehow.

 

I'm not a big Ford expert but this reminds me of
a Boss 302 Mustang from 69 or 70.

I think Ford put 351 (Cleavland or Windsor) heads
expecting kick-*** performance but it sucked-

The heads were too good for such a small CID engine- killed low end torque- low port velocity I think.

Are you eventually going 350? Stay 305 !

 

Think of it like this: 2.02 + 1.60 = 3.62. You have a bore of 3.75. Can you picure these valves taking up a lot of area in that bore? It's called shrouding and it hurts power.

 

i believe he meant the fact that if he is running super comps (i assume those are the hooker long tubes he is switching to) they will be 1 3/4" headers which will lose gobs of torque. also, that backpressure comment, on a motor that makes a ton of torque like a 350 or 383, no back pressure is a good thing but on a 305 with 250 ft lbs of torque, losing 15 ft lbs to gain 5 horsepower wont help much.

 

You will probably see high 13's......somewhere around 13.8-13.9. Figure the cam and heads on a 305 were only good for around 40HP........ And if your still running the stock TPI expect less........

 

shutup len hehe just cause your car is afk for the moment...dont dis the 305 damn it, with his heads, cam, intake you should race him. im sure hed take you out sucker. i meant once you get your car started

 

You might be in the high 13's, maybe even mid 13's.
Here is my best run with my 305 TPI,


I had headers, 3" cat-back, 52mm TB, Crane Cams PowerMax 2050, 87 TPI converted to Speed Density, MSD 6A, Blaster 3 coil, SLP Dual CAI, T5, 3.42 LT1 rear end, and the best part, A NON FUNCTIONING PROM!!!!! Car was running in Limp Home mode for the 6 weeks that the motor was alive. Pocket Programmer 2 didn't work in WinXP. So I was burning non-functioning proms.

Here is a nice shot of my old motor,


Motor looked like this before I did the TPI swap,