G Atsma

10 years later, you might STILL be right!

06GR

That came off as me being a dick. Didn't mean to do that. I've just seen comparisons and heard numbers that aren't realistic because they came from a dynojet. I guess conversely, Mustang dynos are notoriously low. My LS2 dynoed on a mustang dyno at 350hp, with full bolt-ons and an email tune.

Darth_V8r

iTrader: (4)

What are your bolt ons?

06GR

Boltons Then 350whp/338wtq:
Ported FAST 92
Shorty Headers (worthless, I know)
Vararam
Stock stall
Flowmasters
Email tune by SSI

Now 410whp/370wtq:
BTR Stage 2 Cam - 227/234 .614"/.576"
Ported FAST 92
Ported 243s
Duspeed OTR
Kooks 1-7/8" w/ high flow cats
FTI 3200
Spintechs
Tuned/dynoed by Cunningham Motorsports

06GR

Both were on Mustang dynos. I think the 410/370 might be a little low

T.Man

So basically, you're saying your GTO (with a trash 2-piece factory DS) and IRS rear dyno'd less power than these other cars from 10 years ago, on a different dyno and in completely different weather/state?

That's just super.

codyvette

iTrader: (24)

LOL ! The Dyno super knowledge, genius, guru, scientists are on a roll again. They definitely need to learn to find a little more comparable scenarios though. Maybe some newer ones anyway.

big hammer

A buddy of mine made 371. I made over 400

big hammer

BuT fAsT iNtAkEs ArEn’T wOrTh It

06GR

LMAO. I'll be getting the 102 soon. Maybe a ported one from Mamo. I should have went 102 from the start, but got a really good deal on my ported 92. It worked well, but now that I'm cammed, a 102 is in order

kingtal0n

iTrader: (1)

I think smoothing should be 0:
especially at such low output
Those curves should be nice and smooth. I don't see any missing pieces so the pickup was working without intermittent issues.

It makes me think the ignition timing is too far advanced, Jagged curve even with smoothing? yes.

Was timing removed to find start of mbt plateau?
It would be around 24* max I would think. Even 20 is enough. That graph looks more like 28 to 32 with 93.

You will find out soon enough if those really are jagged due to cylinder pressure. Think of what is getting addl stress when cyl pressure is spiking due to too much timing -> head gasket, piston surface, rod bearing, and in severe cases mains. so if you break a piston ringland or pop headgasket in say 5000 miles around that. perhaps 10k the LS is a pretty amazing given. The rod bearing shows up later, you would think. But in some import 2.0, 3.0 engines it is quite a frequent result.

Darth_V8r

iTrader: (4)

To me, I wouldn't call that full bolt ons. Here's a few bolt ons for you - even though you're cammed - I think they'll help you more than you think;

Electric water pump
Electric steering conversion (MR2 electric PS pump)
Crank Scraper
ATI damper

Then there's the list that gets back and forth as to is it bolt on or not:

Even roller rockers at 1.7 ratio will improve things at low lift due to stock lifter progressive ratio
E85 conversion

06GR

I've been thinking about an underdriven ATI, but was worried about accessories not spinning enough (AC & alternator)
I had a buddy pull off his electric water pump. Can't remember why, but he went back to belt-driven.
I went LS7 lifters, but if I had it to do over, I would have gone Johnson short travel.
I've been considering roller rockers, but have heard they're a waste of money and trunnion upgrades to stock rockers are the way to go. I guess the only way to find out is to buy them lol
I would never go E85. Not enough gas stations around me that have it.

G Atsma

I consider rockers bolt-ons. You're not tearing into the guts of the motor, just popping the valve covers. Minor, compared to doing a cam(which, compared to some other engines, might be considered minor too! lol)

Darth_V8r

iTrader: (4)

I do too, but not everyone does. Some will say once you pop the valve cover, it's internally modded. Although in the old SBC days, bolting on 1.7's was exactly that... Edit - hell, i don't worry about someone swapping springs as bolt ons or not, as long as they left the cam and lifters alone. Cause you gotta get into the motor to get to the lifters. Same with a crank scraper. Dropping the pan to put one in is NBD IMO, but I can see arguing that one the other way too

Not to lecture, but at low lift, stock rockers are 1.4-1.5 at best. They aren't 1.7 until near peak lift. Rollers are 1.7 outright. So you actually gain more low and mid lift duration on rollers - even the same ratio. Rollers add weight, which is why people like to stay stock. The stock steel rockers are very light over the valve, which is where you need it.

Def agree on the LS7 lifters. Although, I'd just go solid and be done with it. And 3/8" pushrods.

Theres a couple threads where guys set bolt on records, but I think that was using everything you can. probably stuff that wasn't even on my list below. it's an expensive way to get to 440 HP, but you retain your stock drivability (as opposed to the "cam the **** out of it" method), so I can certainly understand the attraction.

10% ATI won't underdrive enough that you'd notice the difference. but it dampens better which helps you rev better.

I'm with you on E85. not enough near me. but it's an option, anyway.

AnotherWs6

iTrader: (17)

Why not?

HioSSilver

iTrader: (8)

370 is very much doable.

Decent numbers op. More to be had there if you want it.

06GR

Let's agree to disagree before we resort to pulling our dicks out lol

06GR

Maybe you can give me a brief explanation on that. If both are 1.7, shouldn't they both be the same length and both be 1.7 at all times?

T.Man

No one wants to play swords with you because first, that's gay and second, you're just flat out wrong.

Honestly, you're trying to compare two totally different drivetrains. LS1 and LS2 GTO's have always made less power than their counterparts running the same motor/transmission combo due to the IRS, factory 2 piece drive shaft and less than stellar air intake design.

You're the one who seems to want to pull your dick out and start swinging it wildly at people, in the hopes of somehow starting a **** poor argument or in your mind, a discussion. Not only that but you thead-necro'd a discussion from over 10 years ago.