Tacteam1

My 01 Z06 with a RM Racing Y-Pipe Cold Air Intake fitted with 2 - 3 1/2inch cone K&N Filters, BBK Headers, Full Borla Exhaust, Smaller Diameter Powerbond Race Performance Harmonic Balancer, ACDelco Iridium Plugs and MSD wires just got a Tune and dynoed at 378rwhp on a Dynojet Dyno. I’m happy with that number but my goal is to at least slightly break that 400rwhp mark. I know not all the above parts I listed make that big of a difference to rwhp but I’m trying to squeeze out as much hp as possible without going forced induction or doing a cam. I’m not 100% opposed to a cam but trying to get to that 400rwhp mark with bolt-ons. What suggestions do you have? Intake and throttle-body maybe? Thanks!

grantv

BBK shortys? Maybe long tubes and a suitable tune will get you there?

zeevette

Also, ditch that twin cone crap for a Vararam. It won't show on a dyno, but it will perform on the strip. Seriously, a cam can give you an easy 25-50 RWHP, and increase your TQ if chosen well. They're not too difficult to do, and you can upgrade the oil pump too. I've done a cam swap 4 times in my garage, and now it's just a process. I assume you still have the pup cats, which you would ditch if going long tubes.

Not4spd

FYI I did 400whp with Borla XR-1 longtubes and tune. Ditch the shorties and go longtubes.

Tacteam1

Tacteam1

Tacteam1

BuzC5

Tacteam1

CalF

There have been tons of posts on the elusive 400 rwhp with bolt ons only. 99 % claim not possible. Someone saying they have, must have used a a VERY generous dyno. Even a 2004z with long tubes,cai,160 stat will be somewhere between 370-385 rwhp depending on how conservative the tune and regardless of what dyno is used.400 rwhp will require a cam change.

Tacteam1

Not4spd

or the 99% that can't break 400whp or come damn close to it with simple bolt ons is because they don't have a good tuner. My Z did 370whp with shorty's and no tune.

Navy Blue 210

1 7/8" LTs, Tony Mamo Ported Fast 92 or 102, LS2 90 MM TB, Vara Ram, LS3/7 card style MAF + a good tune = 400+ RWHP.
Scotty2000SS (C5 Performance results section) has 440+ RWHP with bolt ons, study his recipe.

Andrew

Work to reduce parasitic loss, such as electric water pump, underdrive pulleys, removing AC, weight of wheels / tires, etc.

As others mentioned, dyno results vary, some are conservative, some are generous. If on a conservative Dyno, breaking 400 rwhp without opening the motor is very difficult.

redzg

Wouldn't a FAST manifold and proper long tubes be worth between 10 and 20 each? That would get you to 400 without the cam -- and then even more once you go with the cam. Plenty of reports that shorties don't necessarily add any power (and a couple indicating they lose power).

Tacteam1

Tacteam1

Tacteam1

Andrew

On a happy dynojet you might get there with FAST and LTs. A bit skeptical you will pick up over 20 rwhp though - since you already have had it tuned. On a conservative dyno, probably not.

Just remember that a dyno is a tuning instrument, the numbers will be different and can be manipulated. Just look at the before and after numbers from the same dyno using the same parameters. More importantly, look at the change in the power under the curve, which is more important than peak numbers.

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Gordy M

Something to think about............Unless you find one of those dyno's that generously report HP/TQ you will never get there with the 01 cam. With what you have the 102mm TB will add nothing in hp gains, you would need a much larger engine, cam, etc to make any gains from a 102mm. If you want to find better HP estimates take you car to the drags and look at your trap speeds. 01's usually trapped 112-113 mph when stock and might get to the 12.5 sec, when I had my 01 (in 2001) that was what I and a few friends with 01Z's ran. The 02+ had a better cam and ran 114-115mph and could get to 12.1's. Better tracks would get you better times but the same trap speed. Take yours to the track and look at your track speeds, If you are not in the 118-119 range more than likely your rwhp is not in the 375-380 range. A dynojet has virtually 0 rolling resistance, a mustang dyno has about 1000 lb of resistance when measuring hp, that is why they show lower hp number. A track dyno (1/4 mile) has about 3300 lb of rolling resistance to overcome and is the better measure of hp gains.