Gold Phoenix

iTrader: (1)

First, I recap what I have:

402cid Iron Block
TEA Ported Dart Heads
TSP Giant Camshaft
Edelbrock Intake
IntakeElbows.com Elbow
NW 90mm TB
Edelbrock Drag Race Headers
Dual 3-inch Exhausts with Mufflers
F1R Procharger with 7.25"/3.7" pulleys
Spearco Air-to-Water Intercooler
Other supporting mods

Like the title says, is 16psi all I am going to get with this combo? Everyone one else I talked to said that I should see more boost pressure than that. Or does my combo flow so well that it is not backing up in the intake system to show higher boost numbers? BTW, that is with no air filter. I am not complaining that my boost numbers are low. Couple weeks ago, this thing shreaded one of the linings of my McLeod Twin Disk and it wasn't on a launch. There is no damage on the impeller and no belt slippage. If this sounds right, then I can't wait to dyno it and take it to the track.

ALLBOTTLE

iTrader: (13)

between the engine being a 408 and belt slip thats all you might get, maybe the sdce tensioner setup or custom cog setup might net you more boost.

hellbents10

iTrader: (10)

16psi on a 408 with airflow capability like yours could be making 1000fwhp at 16psi.

ty_ty13

iTrader: (42)

try running a 4'' blower pulley with a 8.25'' crank pulley....

ChevyChad

iTrader: (50)

He said there is no belt slippage, and I would assume that since the crank pulley is 7.25, he already has the SDCE kit...

I would have thought you would see more than 16psi, but I'd let the dyno numbers do the talking before you get too depressed...

slowredz

iTrader: (23)

I hope something is wrong (no offense). I have a similar seup and i'm hoping for about 10 more #'s of boost.

kp

iTrader: (34)

I would think an F1R maxed out would do more then that too. But big cam, heads, assumed low compression and depending where the intercooler is that may be all it makes. I would worry more about the HP number then the boost number though..

ty_ty13

iTrader: (42)

word... i big cam can drop boost and keep a good MPH... take it to the track!

Pro Stock John

iTrader: (34)

16psi with a built 402ci might be a strong runner, how are you gauging your progress, the track or the dyno? Are you full weight?

67Firebird455

iTrader: (27)

I would think you'd see closer to 20 with that setup, but I'm sure you can't really complain with 16psi and that build! That is a ton of CFM going through that engine!

EPP

iTrader: (22)

You really should be seeing more than 16 psi, I'll bet you either have belt slippage or you have boost leakage somewhere. Bob

Slowhawk

iTrader: (12)

Compression and Cam overlap with dictate boost pressure since it's measures backpressure.If your setups bleeds off alot of boost then 16lbs will make power.If the setup doesn't bleed pressure then there is something wrong. Dyno it.

Pro Stock John

iTrader: (34)

He's running it appears to be a TSP Giant, is that like a 236/242//111 type of cam?

ty_ty13

iTrader: (42)

hmm that is a fairly large cam with a 111lsa.... take it to the track or dyno....

also you may not be loading the tires enough on the street to see a good boost number.. hell you may just be frying the tires and not realizing it... no matter what any one says you still have to put load on a blown motor to see boost...

Websy21

iTrader: (34)

hmmmmmmmm thought u would have seen more than that too, I could see if it was a D1. I agree put it on the dyno and see the power numbers, a big cam is on eof the deciding factors on how much boost you will see. Really who cares about boost #, dyno that monster

Gold Phoenix

iTrader: (1)

OK, I am getting some mixed opinions and also need to add more info. The CR is about 8.7:1. The TSP Giant cam is a 248/254-114LSA. Yes I am using the SDCE pulley system with about 15lb set on the spring tensioner. The intercooler is a 1500cfm flow rate. The intercooler is mounted were the A/C compressor and pressure piping is very short and simple. For example, the connection from the blower to the I/C is only 6-inches long and from the I/C to the TB is about 30-inches. There are also stainless steel band clamps holding the 4-ply silicone coupliers together. I am pretty sure that I don't have a leak.

I am still doing some fine tuning on the part throttle and it is alittle rich at WOT. I took it to the track a couple weeks ago but the clutch failed on the first pass. I want to dyno it, but still working out the bugs.

Gold Phoenix

iTrader: (1)

I checked the serial number with Procharger and they confirmed that it is a F1R made three years ago.

Gold Phoenix

iTrader: (1)

The high power runs were made in third gear on the highway starting from about 45mph and it pulls like a freaking freight train. It took awhile to coast back down to the speed limit.

Gold Phoenix

iTrader: (1)

Here is some more food for thought. I did dyno the car on just the motor with the factory LS6 intake, TB, MAF sensor, air filter and 87-octane gas (low CR and big cam). It made 445whp at about 6500rpm. The dyno operator is a ASA racer and used LS1 motors before. He told me that they picked up 30whp just straightening the airflow with longer duct work on a stock motor. We agreed that I could have lost more than that with a more radical motor using a restriction with a factory induction.

Gold Phoenix

iTrader: (1)

Well, I guess now I have to goto the dyno since I can't hook at the track. The best I could pull off was a 11.65 at 134mph with me spin in 1st, 2nd, and 3rd.