well for right now i plan on moddin the motor now besides the few little dress up things and the carb swap i did. but the plans i have are:

Comp cams XE262 cam kit
Port and polish stock heads
hooker supercomp long tube header
2000 rpm stall converter
and for now my stock 10 bolt (worn) posi rear with i think 3.42 gears i think.

i also have a 9 bolt posi disk rear with 2.77 gears that i think ill spend the money and upgrade to 3.45 gears and a new posi.

but what do u guys think this will give me powerwise from what i have now, right now im guessin i have 210hp, i had someone do a desktop dyno thingy and they got 210-215.

im hoping with all the other stuff i do after the holidays like more towards febuary i should have all this stuff and then get it installed and want to know if ill be at or above that 300+ hp range. also i have a Nos superpower shot nitrous set up that i got for 200 bucks and its set up right now for a 125 or 150 shot forgot which and i want to put that in also. does that sound good guys.

thanx.

tim

 

why not save the time and money and pick up an L98 to drop in....keep your tpi if you'd like and you'll definately have that amount.

i know of a full exhaust and L98 you could use.

 

well my car is carbed and finding and entire l98 with wiring harness and everything i would need for the swap around here , theres no chance to find it all. plus my parents are kinda "mad" with me becuz i have enuff car parts in the gargage so i dont really need an entire engine and everything for a swap siting there till id get it done.

with the cam and headers and torque converter i can put practicly all that in my room. and i might later on get a supercharged 355 for $3000 from a guy i know that said i could have it for 3k but i just dont have that money right now, so im basiclly workin on my suspention right now and figured ill modify my little 305 a bit more and when i do swap motors i could sell my modded 305 to someone that could use it. when ever that time comes around.

these mods for the 305 right now are just to get the motor to be faster and more powerful untill i blow my money on a 350. becuz im just estimating ill be spendin about give or take 1500-2000 bucks for gettin everything done and on the road.

 

i think if you do those mods, you'll be very happy, your essentially improving upon the worst parts of the 305 and your going all out on them
theres only one fatal flaw the 305 really has, and thats its small bore
theres gonna be alot of people telling you on here just to put a 350 in, but i understand where your coming from, cuz i already have one 350 sitting in my garage bound for my RS, so the Z28 has to stay a 305 (parents dont want anymore engines)
305 is still a pretty good street engine, out of everything listed, make sure you port the heads and upgrade to 1.94 intake valves

 

so should i just upgrade the intake vavles or so i upgrade both intake and exuast vavles too? or should the stop 305 exuast vavle be fine for my set up? what brand name companys are good? ive Manely is good. and thanx for understandin me and yea i know everyone well mostly everyone will tell me 350 350 350 lol

 

1.94" intake valves highly recommended. Stock 1.50" exhaust are fine. The Manley ProFlow-style valves with the reduced stem seem to help flow.

You should seriously consider replacing the stock press-in studs with screw-in. And, upgrade the springs to match the cam lift. Personally, I think the World heads are the better path than putting all that work into stock heads, but budget-wise, stock will probably cost less (assuming no cracks or core shift). Your choice.

I don't think I'd go with long tube headers. A bunch of hassle for very little gain on a 305. The '86-'90 TPI-style exhaust will all bolt up and work fine for your application. Less hassle, better ground clearance, probably less expensive by the time you get it all together than long tubes.

When I got my converter, I told them what I had planned and they said it would probably stall at 2000 RPM. It actually stalls at 2300; when I told them that their response was, "You're must be putting out pretty good power there." But, it still isn't quite enough stall for the track (fine on the street). So, if ET is your plan, you might want to go with more stall.

Using NHRA MPH conversion and standard MPH->HP formulas, I'm putting about 250 to the rear wheels, so I think your estimates are a little low.

FWIW, you could put an L98 350 under your 305 carb controls and be just fine (assuming you upgraded the exhaust and air cleaner as well). You wouldn't need to convert to TPI just because the base engine is L98.

 

So ur sayin for the long tubes it would be too much for the 305? but also from being N/a i might throw on the laffingas (nitrous) just to see how the car would act and see if i would do any better and if it does help alot id contuine to use it only at track and eventually send the motor out to be checked and then all forged internals put in it for more juice. and im thinkin if theres more goin into the motor i have to get it out as fast as i can bring it in. ya know what i mean. also i think the long tubes might help me out alot since right now im runnin stock LG4 manifolds, so there might be a bost of power since the hooker long tubes help scavenge (sp) enffect unlke the shorties but this is what ive heard. also if i get the long tubes i dont think ground clearence will be that big of a problem becuz i have stock springs and the car isnt low or anything and ill have to mesaure how much room i have but from pics ive seen i think it might take like 2-3 inches from the room i have now,

but i will also be driving this car on the street and was thinkin the 2000rpm stall would be good for the street and track and wouldnt be too much for the road.

with the Manely pro-flow valves is there any way to buy just the 1.94 intake vavle or do i have to buy the entire kit?

and when u said my estiamtes where low, which were u talkin about, my power estimates or ET estamites?

and the thing with the l98 motor is im "not aloud to have any more big car parts in the gargage" becuz right now i got my 9 bolt posi disk rear in there torque arm, and bunch of other crap, so theres no room too keep a motor in there till it gets installed.

also the vavle springs are in the cam kit. the Comp Cams xe262 cam kit includes : camshaft, springs, seals, timing chain or gears, lifters, and spring reatiners and locks in the kit for about 300bucks. and i dont have the cash right now to get after market heads but that is on the list of things weather i get a 350 later on down the long road or the 305 now.

sorry about the long post but i think i covered alot of everything u posted about.

 

Not saying long tubes would hurt, just that they won't help enough to be worth it, especially on a 305 that's street driven regularly. If you plan on a power adder, the long tubes become less important, actually, so stick with some nice shorties that are easier to install and maintain decent ground clearance. I don't think you'd be disappointed with the Hooker 2055's (what I meant by '86-'90 TPI style system). But, by all means, get rid of the LG4 manifolds (and everything behind them). L98/LB9/L69 would be a vast improvement over them, even (as long as the rest was changed, too).

You can buy the valves one at a time if you want. Summit and Jegs both list them individually, so buy 8 of them. Best results would be with both intakes and exhausts replaced, so "regular" 1.94" intakes might be the way to go if you can't replace all 16.

A good converter will stall high enough and still be driveable. 2500 would be better for the track, but not too much for daily driving.

I think you're on the right track. I was thinking your power estimates were low, I realize now you were talking about your current output. Never mind...

 

so which valves should i get from them they have the budget perofermance replacemnt, streetflow - street master, raceflow - race master, and severe duty ones and buy the prices im lookin at there not that much they got the raceflow vavle for the exuast 1.50 for 9.69 a vavle and for the 1.94 its the same price and its the raceflow also