Looking to run 9.90 with a small block, im looking for input on engine combos, open to all your ideas, cid, procharger, turbo, nitrous, i still would like to drive short distances on the street every now and then.


Car is a 68 barracuda #3000, 727 trans, 8 3/4 rear

Thanks

Since you didn't mention a budget, I would build a FI 400 inch Indy headed turbo.

these days, to run 9.90 at that weight i would go with an indy cnc head and indy intake, a semi mild streetable roller, some compression that is mild enough to run 110 with (12.5 or so) and you are there.

my combo is w5's(likely not quite as good as a cnc indy head would be)a bit more agressive roller than what you could get away with, and an 8 inch convertor. i have been 9.85 at 3350 pounds, a good bit more weight than what you have to carry. I drive mine some on the street , but not a ton.

416 inch forged bottom end and the above indy topend end should get you there rather easily.

The key will be selecting a streetable roller lobe that will make enough power without real big spring pressures. mine is 270/ 590 spring pressures , and has given me no problems in 6 years. I suspect one step down in lobe type would be enough to get your car in the 9's rather easily...If i get a chance i will find out what lobe i have, fast 68 plymouth, who posts on here selected the lobe i use, and is extremely handy with cam selection.


Or you could run a flat tappet, less compression and pump gas, and sqirt it with a 125 shot to get there.

At 3000 pounds, its mighty easy to get a eddie headed 416 in the mid 10's without a lot of compression?(11.5-12 to 1)or a roller, and you could then sqirt that combo to get in the 9's rather easily.

Build it with E-85 in mind and you can up the compression
and get away with cheap fuel

I plan on running 9.70 with a hydraulic roller cam, NA. I already sent Ryan a check to make sure that happens.

Lots of great replies already! Keep em coming!

I agree with Mike. Chassis insp..$210..NHRA phys...$350 w/ekg...being able to run 9's...ah well take down that net and take your clothes off, run 10.00...PRICELESS!

Here is what I suggest. But first. Is your car 3000 with you or by it's self? How much do you weigh?
Anyhow, you did not give a budget.
I like NA, so it's a R3 9.56 deck siamese 4.185 bore 11:1 compression with a callies 4.25 stroke crank, Indy -1 245 CNC heads/manifold and a good roller cam and you are set. Plus some good headers / ign and carb.

Humm... The choices.

Assuming the car works...

If you want durability for years and years to come start with an R3 block, 408-425" with good internals, Ported Eddies, 360-2's, CNC'ed, doesnt really matter, your choice... Solid lifter cam around 240 @ .050, 600 lift, 750 DP...

BW S400 (75 or 80mm) with 12 lbs of boost on pump gas = Game Over.

Turn the boost up, add race gas, and go 8's.

I went 9.40's with my smallblock on pumpgas-14-15psi...5.60's with racegas in the 1/8th-24-25psi.

Sure cost a whole lot to get there and definetly not for the faint of heart.

Definetly not the cheapest way to get those kind of times, but I have enjoyed every minute...well atleast most every minute.



408ci Mopar Resto-block
Edelbrock heads
Twin 61mm turbos
http://www.youtube.com/watch?v=1NJeUG2mpVA

The reason for 9.90 is because a friend of mine says it cant be done, so I see a challenge, and its time to step it up a bit anyways, my current combo is feeling kinda slow lately.

Also I forgot about my weight, so the total weight with me would be #3160

What I kinda had in mind was a 408" - 416" block, I have a '69 340 block and a '70 360 block also a r-3 block would not be out of the question if needed, Indy 360-1 cnc heads and intake, 950cfm holley, solid roller cam, TTI headers, rods and crank im still undecided.

I also can get a procharger setup from a friend at a good price.

Lets here some more ideas,Thanks

You don't need a power adder to run 9.90 with a small block. A good set of heads with a strong bottom end will get it done.

Invest in an R block, much stronger webs & pan rail than the stock 340/360 blocks.
I'm hoping to card a 9.90-something with 368" in my 3000lb footbrake Duster myself. Combo's fairly basic & posted on my "toy" website, http://topside.info.
Then, after I get thrown out, the plan is to just run low 10s so I don't have to jump through the 9.90 hoops...

I bet Ryan is building a 4.375 stroke 4.25 bore W8 motor with super light weight rods, pistons, and crank for Ron. It will probably idle like stock and need wheelie bars