whats the best motor combo to run 10.50
 

i have a backhalf 92 camaro.it has a 4 link with 411.i have a 30 inch tire and i have a turbo 400 with a jw brake and a 8inch converter.i have the dart plat.iron head 220 runners and 205.i have a solid roller263/270 661/633.i have a victor jr ported and polished intake.im looking to build a 388 or a 406.with 12 to1..im looking to get into the 10.50 range.is that possible.i have a 400 block and just a cast crank.but the block needs to go 40 over..so some of my ? is 350 or get the 400 borde out..help please..

well... i put a budget 383 together to get me though till my 406 was done. it has stock alum corvette heads and pink rods and it running low 11's in my 2500 pound vega shifting at 6500 rpm........you can build a 10.50 motor with what you got :wink:

i got a stock bore 400 sbc block(only 2 bolt) and a few 350 blocks(2 bolt and 4 bolts) if you need one :wink:

your going to need about 650 hp

I have a 3100 pound s10 blazer, 3100 with the fat boy in it
385, 4340 stuff,crank, h beam rods, dome pistons its 13.2 to 1
afr 210 cnc heads, t&d shaft rockers, custom crower roller cam, ground for my motor,4/7,2/3 swap, super victor, pro systems 4150 carb
glide with brake, 4:86 gears
33 degress timming, shift at 6500
ran a first pass of 10.67 off trailer first pull last yr
has ran a best of 10.56
last race I ran in 2010 went to semi finals ran 3 10.62 passes all at 128

his camaro is must likely alot lighter then 3100 pounds..... he can reach the 10.50 for sure.... close to 600hp would do it :wink:

How much does your car weigh? Might be difficult to get there on a 4.11 gear. I'd build the 383 or 388 whichever. I would also go with more compression unless you already have the pistons. Good crank. 6 inch rods, and a good piston (all ballanced of course) with your intake, heads and cam and more like a 4.56 or 4.88 gear will get you there if your car is light enough (2600 - 2700 lbs). What convertor do you plan to run? I would think at lease a 5000 and maybe a 5500 with the cam you listed.

car is 3080,but im going with the 406 12 to 1,block deck to 0 and i have 64cc chamber heads.the stall is a 5000.but i should be pretty close to my goal...thanks for the info...good luck everyone..

go ahead and put you a 200 nos system in place and get the right cam in order for the nos along with proper ring installation,fuel and timing system......thats all you will need on that 400ci for EASY low 10's...possibly some 80's or 90's if your car works well....One thing about NOS many do not know is that its a Great Chassis tunning device..This did not sink in with me until year before last....

Nos is as safe as running all motor if you know what your doing setting it up and running it properly

3150 LB SS MONTE CARLO 10.20'S SHIFTING AT 7200 RPM WITH FLAT TOP 406.YOU WILL NEED ATLEAST 4.56 TO GET THOSE TIRES TURNING.

what head are you running and whats the compres.

what does it help to have a 4/7 swap on the cam?

it helps the motor breath better and free's up some ponies....... about 30 of them on average :wink:

i think the 4/7 swap has something to do with helping harmonic vibration

afr 210 race ported,11.1 compression.

it allows the exhaust to flow better and moves the hot spot as well.... which frees up horse power

here is a good 5 page write up in hot rod as they explained it all and tested it...... very good read :)

http://www.hotrod.com/techfaq/113_07...ams/index.html

No way your getting 30 hp more by changeing the firing order,5-10 if your lucky.

the one show on speed tv(cant remember which it was) their was on a $3500 crate edelbrock motor.... they dyno'd it right out of the crate and then swapped just the cam for the 4/7 and it made 30 more horse and more torqe...... with the same carb and intake

actually it was on horse power tv..... they used a edelbrock $3500 crate motor.

You will get different results on different motors. Stating a 30hp increase is a large blanket statement. Some may others will not.

Curtis

those tv guy's want to be engine guru's, it's like the wwf kinda fun to watch but almost impossible to believe.

that's funny!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!
 

yeah , that's funny.......30 HP from a timing swap :roll:

love to see it on a dyno......better yet.....on the track with a timeslip :wink:

30 hp can be found pretty easy on very weak built ( stock type) engines...Not out of the Question for sure....not saying the 4/7 swap cam will gain this kind of HP on any engine but not saying it won't either...the Higher the performance engine the less chance you gonna see these kind of HP number gains .

for that mater you can take 2 engines use the same Identical parts, same Builder using the same tolerances and One will make more HP then the other...there are many Theories and explanations but No-one really knows for sure.

Juice,
I tend to believe the intake has a huge influence over whether or not the 4-7 swap is successful or not, and the head flow to a lesser degree. Flow harmonics, a little over my head though. If you have a well thought out induction system 30hp is hard to come by.

Curtis

I have the 4/7,2/3 swap cam it makes the firing order simple
18726543
crower recomened it for my motor, when they ground a cam for me and it was the same price as the 4/7

I hear what ya saying curt. I am not taking a position for or against that a 4-7 swap camshaft could make this kind of HP difference alone..I just don't Know...but what I do know like I said in my last post is a weak Built ( Bone stock type crate) engines have huge HP gains for minimal changes...so what I was trying to highlight is the difference in high Performance engines finding Hp VS. a Crate type engine...I think they said they used a crate engine in HP tv..

Now I will tell what I saw with my own Eyes...a carb and header switch,a minor angle mill on the heads bringing compression up 2 pts.. gained 83 hp on Dyno...this was on a GM CRATE engine used for Late Model round track racing.. (602 I think) they even had scored some of the extra tear off bolts to replace the parts......I watched this with my own Eyes at Clements racing in Spartanburg S.C. home of the LATE MODEL round track engine.
I have seen a 30 hp Gain also in Fuel Only ( Round track engines ) VP C-44 The Cost was $2500 per 55 gallon Drum 7 yrs ago !!!!! :roll:


Heres a little discussion off YB to where it mentions c-44 and few other fuels such as Q-16....Back when I owned my own race fuel Business C-44 was king of Circle track Fuel it retailed for $50.00 a gallon back then..
A huge help was the fuel is only 99 octane which the lower octane alone makes more HP on lower compression engines..Many in the past didn't or still don't know today.... they just started coming out with all the exotic oxygenated fuels back then...Now the market is Flooded with oxygenated fuels

by the way Curt How is your Son doing ?

Thank you for asking, he is well. He leaves the F.O.B. in 13 days headed home. I am more worried now than I ever have been, thoughts of something happening so close to getting him home keep creeping in. He has short timers bad. lol

We have a 23° 408 that made 702hp on the dyno. Old set of worked -10 heads. I suspect that if a 4-7 swap would net us 30hp on this motor we would probably spring for it. I really don't think it is there to be had that easy though. You are right on a motor that has a better potential of gain the increases you can see are greater.

Curtis

prayer said for him Curtis

[/quote]
i think the 4/7 swap has something to do with helping harmonic vibration[/quote]

That is why my swap cam is in my motor !!!!

wish i said that! so true :lol: :lol: :lol: