DriveFast7

iTrader: (1)

I would like to take a look at it.

On a similar note, what rpm does peak HP hit on same motor. DHLA w/40mm chokes and good exhaust system.

hornbm

just one 40MM dhla on a street ported 13b?? That carb is WAYY too small

DriveFast7

iTrader: (1)

no, one 48mm dhla with two 40mm chokes.

anyone have dynosheet of 13b 4port streetported?

DriveFast7

iTrader: (1)

bump for dynosheet or first hand knowledge where 13b 4port streetport hits max hp.

Siraniko

iTrader: (13)

I will let ya know. Im waiting for the next buttonwillow dyno day. I will bring the dellorto, then I will install the IDA so you can compare.

DriveFast7

iTrader: (1)

Haha! Thanks Mel, I hoped you would help. Rotary Reliability and Racing in Santa Ana has a chassis dyno, I might head down there but yeah, I'm waiting for Buttonwillow too. We get a good rate there.

clean85owner

That's where I had my 13B 4 port built. Nick claimed 215 hp at the crank, but I have no dyno stats on that. As for peak power... The motor is quite strong from about 3,000 all the way to about 7,200. It still pulls nicely after 7,200, but it seems to slack off a little. I doubt my motor is making that now considering it is 10 years old and has nearly 120,000 miles on it, and I know it isn't making near that to the ground with how badly my clutch slips. The car still runs well, though. I would definately contact them again when it comes to a new, built motor.

bill Shurvinton

215 is believable. Your peak will be about 8000, but it will be pretty flat from 7K up. Peak torque will be around 6000. The length of trumpets you use can move that peak around a few hundred RPM either way.

Bill

DriveFast7

iTrader: (1)

Thanks Bill. I got the RB 2 piece manifold and 100mm TWM Induction full bellmouth velocity stacks. In the REPU. To increase torque and lower peak torque rpm.

I'm trying to find a non RB 1 piece U bend 13b 4 port manifold for the Dellorto. Have a lead but everyone I talk to says they do not exist. Gotta use 12a w/adaptor or the RB 2 piece.

Siraniko

iTrader: (13)

Brad,
I have a one piece 12-A manifold plus a 12-A to 13-B adapter in case you wanna try it.

Mel

1984se

Hey Brad, Lets go dyno after i get George to put 40mm in mine. Except i have a 6pt, I wonder how how it'll compare. Let me know where a good dyno place is, or maybe we can ask a certian someone this fourm to give us a discount...


-Ryan

diabolical1

iTrader: (3)

did you get it dynoed?

FD Racer

if it's not too late.... I want to get in on this dyno action. I too have been thinking about paying RR's dyno a visit.

Rotor13B

Do you have a pic of the manifold and adapter?

Siraniko

iTrader: (13)

Yup, I do but I can i take pics tomorrow. I just finished installing a new engine and tranny in the SA. My garages are now closed.

Rotor13B

Heh, ok thanks.

r0taryluv

I pushed 170rwhp on 5psi on a stock 6port ;]

Siraniko

iTrader: (13)

here ya go.

rwatson5651

iTrader: (5)

I have that identical set-up on my streetported 13-b 4 port!!
I'm running a 44 mikuni with 41 mm chokes and a RB exhaust.
I do not have access to a dyno however,

Rotor13B

Thanks Wackyracer.