Alright my motor is at the shop getting bored 30 over. its a 400 2 bolt main, ill be running about 9.6-9.7:1 CR, my cam is a compu cam with 1.6 rockers which is about 218/226 dur. 488/512, i also have a set of edelbrock heads. for no im going to run a small performer(not RPM) intake and my LG4 Q-jet. because i want to brake the motor in before i swap in a TPI harness and LT1 intake( i have a custom prom burnt as well). and sometime within the next week i am going to order edelbrock TES headers, and i have an edelbrock exhaust system. i want to run a 9 bolt with either 3.27 or 3.45 gear ratio posi unit. im also running a 5-speed. maybe some drag radials will be purchased as well. what do you guys think, i hope i have supplied enough info. either with the Q-junk setup and LT1 setup.

 

I think it will be more like mid to low 13's, but thats just my opinion. Once you swap over that TPI, you will hit the 12 second barrier. I'm sure I will be corrected though.

 

traction will be the real problem. Also that is a pretty tame cam for a 400 motor. Will be very streetable though. I would have to agree though to start out it will probably be a mid to low 13 second car. Once the LT1 intake is on and the fuel injection, it will be a higher 12 sec car.

A lot of how fast a car goes depends on two things for you, traction and weight.

You didn't specify how much the car weighs....whether or not it is a rolling chassis with a motor or if its a full interior street car. That will make a lof of difference also 100lbs is roughly a tenth.

Good luck with the build up and let us know how you make out!

 

well this is a full bodied street car, no weight taken off exept spare tire is already gone and i might take the jack out. i just wanted my car to be very streetable and not a killer on gas but still give all kinds of cars a run for there money. but i know ill most likely get handed off to someone. i would like to run drag radials on the street but theyd probably wear off to fast. also my motor will be done the engine work at 4 today and then im going to build it over the weekend and the first part of next week. maybe thats when ill order my headers. monday or tuesday. if someone has a used set that would save me alot. but anyways if i run mid 13's with the carb on it, id be satisfied knowing that the LT1 intake will blow the carb setup away. my goal is faster than a 13.3 thats what my brothers firebird runs.(407 w/5-speed stock heads)

 

I also agree that the cam is a little mild. Although the 1.6 rockers bump up the lift, the short duration keeps the cam on the small side. The bigger then engine, the more cam it needs to help fill the cylinders.

I ran very high 11's with a 3.27 geared 9 bolt on 26" tall slicks when I had a 383 but I also had enough hp to cross the finish line at 117 mph.

 

i chose the lower duration for the "TPI" setup but my brothers 400 is pretty choppy with a edelbrock RPM cam(488/510 lift) 230's and 240's dur. tho i think. Stephen what mods did you have done to your 9 bolt?

 

None and I never had any problems. I switched to a beefed up 10 bolt when I needed a better gear selection and was dipping into the low to mid 11's. I switched again to a 9" when I installed a transbrake.

 

So your car was automatic? if so that sux, its obvious that the rears only brake on standard cars or extremely high hp/tq auto cars, because i know someone running high 10's on a stock 10 bolt with a posi unit(GM posi) but he has an automatic. maybe a 9 bolt will hold up with my 5-speed. only time will tell i guess. im leaving now to go pick up my block pistons rods crank ect.

 

The one thing you have to remember about the cams in these motors is that the act smaller than normal because of the displacement. Also the fuel injection can adjust for a lot of the choppy-ness.

I personally run a solid roller 248/248 cam with 615/615 lift on a 110 LSA.

It has a noticeable idle (eh hem) but it runs on pump gas and I don't need a vacuum canister for the brakes. I have a DFI 6 to control it all.

Also Drag Radials DO last on the street. I have had my Nitto 555Rs for almost 2 years now. It really depends on how hard you are on them. I have to switch to slicks for the track but the Nittos do work pretty well on the street.

My car is also a full interior car with working A/C and power steering, cruise control, stereo with 2 12" subs. The only thing I took out of the car was the spare and the jack. It weighs in at 3680.

One more thing is about the rears. I borke my 10-bolt when I started dipping into the low 14's with a 305. After I broke the 2nd one, I ditched it and got a 12-bolt. no problems since.

 

My engine is a 469. The cam is flat tappet .638 I/E, 110 LSA, 270/280. It idles around 1200 with very little lop or at least you can't tell with the open headers.

My next cam is going to be a solid roller. .714 lift but a duration only in the 260 range. The cam will build lots of torque and keep the HP range well below 7500 rpm. I don't need a cam that makes power to 8000 rpm like Comp Eliminator or SuperStock grinds. The cam will also be easy on valve springs.

 

my motor obviously isnt a killer, i have a lower lift cam a little higher than stock compression ect. maybe in the future ill put a little higher lift cam in it but not untill i run this setup for a little while. hopefully i can get the LT1 intake setup going good on it(carb-TPI-LT1)

 

I don't see any reason why your motor can't puch out 350hp (at least) with the specs you are talking about.

I would not buy an Edelbrock TES system - I would go for SLP or some other better brand 1-3/4" primaries. I would also go for a 3-1/2" exhaust for flow.

The Q-jet will work up to 500hp as long as its running right, jetted perfectly, and is running on the right intake - you can use a Performer RPM Q-jet intake if you have an aftermaket hood. That intake is good for 6000+rpm (I have one). Get a good aftermarket electric fuel pump and install it near the tank - use a regulator to not flood the carb. Use a good A/F meter to tune the carb properly. The cam might be a little small, but unless you want to go roller, its ok.

 

i have SLP 1 3/4's comming to me, hopefully they will be here before the weekend. but im only running the carb for now its a stock crappy running carb with a regular performer, but im putting fuel injection in it. so thatll be alot better. i guess time will only tell. im still looking for a 9 bolt posi rear.