Nicelysedated

So the beginning of february the stock L98 is coming out and a 400 sbc is going in. My plan was to go with a new intake and carb because it is quite frankly more familiar. But I am contemplating trying the TPI setup on it to see how well it runs. With a stock 1991 map TPI setup, what needs to happen to get it up and running on my new setup?

400 bored .020
Pro-filer 195cc 2.02 1.6 heads
Speed pro flat tops
10.2 compression
.531/.542 Howard solid lifter cam 248/251 @ .050 duration
700r4 w/ 2400 stall converter

From what I've read, map cars wont crank after heavy mods. I have read through the DIY Prom section and im not really seeing what needs to happen. Thanks for any help.

Orr89RocZ

iTrader: (20)

Need tuning equipment to make modifications to the chip's "bin" file for fueling and spark to allow motor to run again.

Dont expect much with stock TPI on that motor. That thing could use larger heads to match the cubes and cam but the intake will need to be much higher flowing than stock TPI to support it.

1MeanZ

iTrader: (9)

with those heads I'd keep the EFI but use a SuperRam with a smaller hydraulic roller cam. With that cam I'd go larger heads and use a MiniRam intake.

Nicelysedated

Hmm, maybe change my order to the 210cc heads w/ 2.08 valves. I think I am going to swap to an Air Gap and a holley carb. The cost of getting TPI to flow that much is just too much for my pocket book.

Orr89RocZ

iTrader: (20)

Did you order the heads yet? Change to the profiler 210's will help, especially the econo ported version by Speier racing. Gives abit more flow and better port than as cast. Support much higher rpm range with that cam than 195's will.

I'd put a vic jr on that setup with 210's in a heartbeat. Actually even 220 air wolfs or AFR's would work well. Dr J's performance with his 220E heads with similar duration cam but a hyd roller, makes up his 600-640hp street bruiser crate engines! Massive power out of a hyd roller combination.

However thats alot of power on a stock 400 block. Much better suited for a aftermarket block.

My buddy ran a similar solid cam but much more lift on his stock 400 block with 195 ported to 208 cc AFR heads and ran mid 10's all motor. 210 profilers and your cam would be a great street motor with a vic jr. Air gap I think would hold it back.

EFI can get pricey if you dont know how to tune it yourself. Thats the major setback.

Nicelysedated

I haven't gotten anything yet. The short block is coming from a member here, was a better deal then pulling mine and machining it. I was gonna go with pro-filer heads because of the cost point and I have read quite a few good things about them. At 1130$ shipped with good springs they are hard to beat. I am trying really hard not to get wrapped up in getting the best of everything, because Uncle Sam wasn't quite that gracious this year. But 450+ HP would be fine by me.

My experience to date is building a few fuelie head 350's and this will be my first build making decent power. I know enough to be dangerous, but am smart enough to stop and ask questions before blowing anything up.

I haven't run a single plane intake before because of the power band, but I'm thinking the low end grunt of a 400 will be plenty to push it off the line with a single plane?

Thanks for the input, time to look at some more websites :-)

Orr89RocZ

iTrader: (20)

Yep vic jr is not that big for a 400" motor. The smaller single planes will be fine. Dual plane rpm type intake will be torquey but hurt above 5500 IMO. Keep rpms below 6500 and power below 550hp and it will live. Problem is with those heads and cam it may be over 550 hp Dual plane air gap rpm may be a 0-6500 rpm range intake on a 355 but on a 400 its likely better for up to 5500. Vic jr will be best to 6000 and below. Other single planes exist for higher rpm.

I'd go 210's if they are about same price but 195's will work. My buddy's 408 uses 195's and he's high 11's on a good day with a fairly mild hyd roller. 0-6000 rpm range for the most part.

Either way you cant go wrong so do what you can get that fits your budget.

Nicelysedated

210's are 50$ more. I think I can swing that. I'm not a big fan of edelbrock and avoid them when I can. Weiand makes a nice intake that is similar.

http://www.jegs.com/p/Weiand/Weiand-...03746/10002/-1