help me build my motor

K

Killer5.0

Well-Known Member
#1
#1
okay so i just completed my 5 lug conversion cobra disc swap a few months ago...next spring i am installing Maximum Motorsports road and track suspension package. i am also going to build up my motor next spring. here is what the motor currently has that i am aware of (all motor work was done by the previous owner(s).)

bbk cold air intake (fendermount)
bbk 70mm throttle body
bbk 70mm maf
gt40 upper and lower intake manifold
bbk FP regulator
f303 cam
underdrive pulleys
bbk headers
bbk h pipe
borla dumps
stock 19lb injectors

ive installed an optima red top and a 200a alternator as well. i want to put in nicer underdrive pulleys and i will be redoing the exhaust as well. if a different intake or throttle body etc would make a big difference please let me know as i want to do it right the first time. someone had recommended Trick flow twisted wedge 170s and a custom cam. but thats all i dont know what else i need...rockers, valves etc so....what kind of power do you think it has now and what should i except after these upgrades? b/c i was hoping to be between 350-400 rwhp. if possible thanks
 
J

JR4 Motorsports

Member Plus
#3
#3
What heads are on it now? That's where your power is going to be had. 400 RWHP is pushing 500 Crank HP. 19# injectors got to go. I would suggest 42#, but it all depends on the rest of the combo. TW 170s are nice, BUT you MUST check PTV clearance, and special Twisted Wedge pistons may be (most likely) be needed. An off the shelf can can be used, but for a few more dollars, relatively speaking, it makes no sense not to go custom.

What are your goals for this? 1/4 mile? Open track??
 
K

Killer5.0

Well-Known Member
#4
#4
strictly street car....i will probably 1/4 it b4 and after just to see results of the engine work on paper...right now it has stock heads as far as i know..it has plain jane valve covers on there so i dont know if any internal work has been done..what is the PTV clearance? i dont have any experience building motors which is why im asking you guys to help me piece it together. do i need injectors now or after the head upgrade.
 
EHA Racing

EHA Racing

Member Plus
#7
#7
500 crank horsepower is a lot more than you think. It's gonna take a lot more than a stock bottom end and a set of TF 170's. If that was my goal with a 302 block this would be my engine.
All forged 347
11:1 compression (for 91 to 93 octane)
225cc TFS high ports
ported vic jr or super vic intake
hydraulic roller cam (for the street)
Prosystems custom carb (ditch the fuel injection if you ever want to keep any money in your pocket with that kind of power)

Also I hate to be the bad news guy but a 500 crank HP naturally aspirated engine is not going to be a fun daily driver. It'll be a lot of work and the fun will wear off soon.
 
K

Killer5.0

Well-Known Member
#8
#8
so what kind of numbers do you think id be pushing with just some heads, rockers, etc...im only looking to spend $3-4k total on the engine work.
 
BadA55f0Xxx

BadA55f0Xxx

Well-Known Member
#10
#10
i ran a stock bottom end in my 306 with speed pro pistons 11:1 compression and pro comp heads stage 3 hydraulic cam from trick flow 1.7 rockers an edelbrock victor jr intake and 650 double pump carb the motor was thrown together by the previous owner the components really didnt work well with eachother and its still ran n pulled hard my guess as far as horsepower was prob 325 and it was nice in the street . . something similar might not be so bad but i would also ditch fuel injection IMO. . good luck and keep us posted
 
EHA Racing

EHA Racing

Member Plus
#11
#11
Hey man we just decided to sell the engine in my brothers car. 306, stock crank and rods, forged flat tops, main girdle, comp hyd. roller cam, extensively ported Twisted wedge heads with poerted super victor, custom Pro-systems carb, 1 3/4" long tube headers, Mallory unilite dizzy, sfi balancer, sfi flexplate, edelbrock nitrous plate. Makes about 400 crank hp without juice. In his 3,200lb hatch street car with 275 drag radials he runs 12 teens. with a 100 shot the car runs 10.70s. This engine is almost brand new and is turn key. I'll take your engine in trade and 4K for his. Just an idea. When I say turn key I mean, hook up a fuel line, plug in the dizzy, plug in the Morso belt drive water pump and drive away.
Here are a few pics:




 
EHA Racing

EHA Racing

Member Plus
#13
#13
Let me tempt you a little more!! LOL YOU COULD DRIVE THIS CAR ANYWHERE!!!
[ame="http://www.youtube.com/watch?v=IdOAFQ3dQ-E"]YouTube- ‪Calypso 10.78 pass.mov‬‎[/ame]
 
K

Killer5.0

Well-Known Member
#14
#14
nice ride...but unforutetly i dont have the money yet...thats y im doing it in next spring...as per my current setup what should i change/add. and y should i go to a carb setup and ditch the fuel injection?
 
K

Killer5.0

Well-Known Member
#19
#19
will it be better than my current setup gt40 upper lower or should i build off that? i want the better one of the two. also should i change my intake or throttle body to another brand etc? just want to do it right..
 
Chevy_Guy

Chevy_Guy

Well-Known Member
#20
#20
It's worlds better than the GT-40 stuff. Not that the GT-40 stuff is bad but trick flow makes some good stuff. That kit comes with a trick flow upper and lower intake so the only other thing you would need would be a throttle body. I think the kit your looking at is a 70mm so I would find a good 70mm body to go with it.
 
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