Post your dyno curve here

Post your dyno curve here

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Discussion

SILICONEKID345HP

14,997 posts

230 months

Monday 17th November 2014
quotequote all
Quinny said:
Same here..... Every time I go out in my LS its fingers crossed it isn't going to eat itselfhehe
Is there a big difference between GM factory built or specialist companies who build them with uprated parts ?


http://www.chevrolet.com/performance/crate-engines...




Edited by SILICONEKID345HP on Monday 17th November 20:52

MarkTVRchim

78 posts

132 months

Monday 17th November 2014
quotequote all
Quinny said:
Same here..... Every time I go out in my LS its fingers crossed it isn't going to eat itselfhehe
Yeah, I can't understand why so many people are transplanting LS engines what with there terrible reputation for unreliability. I was also really disappointed when I found out they have to be serviced every 10000 miles or they will explode.

Quinny

15,814 posts

265 months

Monday 17th November 2014
quotequote all
SILICONEKID345HP said:
Is there a big difference between GM factory built or specialist companies who build them with uprated parts ?


http://www.chevrolet.com/performance/crate-engines...
Why would you bother with uprated parts for a road engine....all that extra expense, when what's already there is more than up to the job of powering a lightweight car around, completely unstressed...


eff eff

754 posts

203 months

Monday 17th November 2014
quotequote all
Quinny said:
SILICONEKID345HP said:
Is there a big difference between GM factory built or specialist companies who build them with uprated parts ?


http://www.chevrolet.com/performance/crate-engines...
Why would you bother with uprated parts for a road engine....all that extra expense, when what's already there is more than up to the job of powering a lightweight car around, completely unstressed...
+ 1

SILICONEKID345HP

14,997 posts

230 months

Monday 17th November 2014
quotequote all
eff eff said:
+ 1
So forged blue printed engines with bespoke superior parts are not worth bothering with !

How can you guarantee where the engine as actually come from .. How do you know its been factory built?

Do independents build better engines ?

MarkTVRchim

78 posts

132 months

Monday 17th November 2014
quotequote all
L
eff eff said:
Quinny said:
SILICONEKID345HP said:
Is there a big difference between GM factory built or specialist companies who build them with uprated parts ?


http://www.chevrolet.com/performance/crate-engines...
Why would you bother with uprated parts for a road engine....all that extra expense, when what's already there is more than up to the job of powering a lightweight car around, completely unstressed...
+ 1
+2

Miss VXTamora

37 posts

115 months

Tuesday 18th November 2014
quotequote all
spitfire4v8 said:
Only way is to take the engine out of the car and run on a well set up engine dyno (even these vary!)
I've got a V8D 5 litre marcos on jenveys in at the moment .. on the dyno this afternoon.
What was the outcome spitfire :-)

Quinny

15,814 posts

265 months

Tuesday 18th November 2014
quotequote all
SILICONEKID345HP said:
So forged blue printed engines with bespoke superior parts are not worth bothering with !
You got there in the endbiggrin

Brummmie

5,284 posts

220 months

Tuesday 18th November 2014
quotequote all
Standard valve springs are out of a Biro, in the lesser LS engines anyway, so if you are going to pop one in, the cam and Valve springs are almost a no brainer, as pounds for performance is about as cheap as it gets.

neal1980

2,574 posts

238 months

Tuesday 18th November 2014
quotequote all
I think it depends what spec you start with...I mean LS1 engines are quite old now and when you look at the price of how cheap forged stuff is it made sense to me.

I have forged crank rods pistons in my LS for less than £2k. That made sense to me long term as I am going to go for some crazy power eventually!

Love the LSA build I saw it at sportmotive in the early days.

A900ss

3,245 posts

151 months

Tuesday 18th November 2014
quotequote all
A900ss said:
Had a dyno run at the Neil Garner open day today and disappointed with the result.

Car is a 450, stealth cam fitted last year, fully decatted, ACT carbon trumpets and a smooth bore elbow. So minor mods only. Was still hoping for more than 240hp though.

Looking at the AFR the car is running very lean as the revs rise and I hope this is why the power curve tapers off so rapidly.

It has a 'copy' AFM so this might be to blame. Either way, had a good chat with Joolz today and I think I'll get it remapped later this year.



Ok, I'm feeling very inferior after the SC LS but I've had my 450 remapped which was pushing out 240hp as previous post. Joolz has worked his magic and found me another 30hp. The car feels much livelier and also a lot smoother.

Thanks Joolz.

eff eff

754 posts

203 months

Wednesday 19th November 2014
quotequote all
SILICONEKID345HP said:
So forged blue printed engines with bespoke superior parts are not worth bothering with !

.......It's not a question of bother, more about how much you want to spend and how much power you and the car can handle

How can you guarantee where the engine as actually come from .. How do you know its been factory built?

.......I bought mine direct from GM

Do independents build better engines ?

......Probably, but be careful one of the early Griff LS conversions had a nightmare engine from an independent
Daz why don't you stop torturing yourself and put an LS into yours........... smile

Richard 858

1,882 posts

134 months

Thursday 27th November 2014
quotequote all
A bit surprised by the torque figure (thought it would be higher!) but here's the result since I cured charger belt slip & misfire. Still backing off at 5500 rpm but this was where the curve seemed to level out (and I think the dyno operator was getting a bit scared !!!)



Here's the "before" graph



Edited by Richard 858 on Thursday 27th November 19:14

Vixpy1

42,620 posts

263 months

Thursday 27th November 2014
quotequote all
425 ftlb's ...

Low

?

phazed

21,844 posts

203 months

Thursday 27th November 2014
quotequote all
Vixpy1 said:
425 ftlb's ...

Low

?
That is really low,........mine's 430 getmecoat



Edited to say,...Great power figure!

Richard 858

1,882 posts

134 months

Thursday 27th November 2014
quotequote all
I don't want to appear greedy but thought ft/lbs figure would be slightly higher than hp.

Vixpy1

42,620 posts

263 months

Thursday 27th November 2014
quotequote all
Richard 858 said:
I don't want to appear greedy but thought ft/lbs figure would be slightly higher than hp.
Depends on what kind of charger it is, that looks normal to me

Richard 858

1,882 posts

134 months

Thursday 27th November 2014
quotequote all
Rotrex C38 c/w intercooler.

Vixpy1

42,620 posts

263 months

Thursday 27th November 2014
quotequote all
Yep, looks good form here

Richard 858

1,882 posts

134 months

Thursday 27th November 2014
quotequote all
Thanks, Charlie, and Peter. I've edited my earlier post to include the graph from the same dyno before fitting all the bits & bobs to show the difference & still on Lucas 14CUX, single coil & distributor !