Hey Everyone,

I am new to the Road Race/Autocross world and I have been thinking about building a H1 Motor. I would like your guys opinion on the internals of the block. I am usually in the FI forum and this is actually my first time in your guys' forum so please be nice . What do you guys think?

This is what i am for sure going to use:
GSR Block
CTR .010 Oversized Pistons which equals 81.25mm

Now what do you guys think i should go with:

LS Crank and Rods
12.02:1 CR
1846cc

or

GSR Crank and Rods
11.80:1 CR
1808cc


Modified by Full-Race Henry at 12:14 PM 10/8/2004

 

HAHA... somehow I knew in the back of my mind you were going to post this...

 

I will try to be nice here!

Try doing a search. There are probably some others that wont be as nice.

This has been covered quite a few times already! Just yesterday in fact!

https://honda-tech.com/zerothread?id=1011270

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by prkiller &raquo;</TD></TR><TR><TD CLASS="quote">I will try to be nice here!

Try doing a search. There are probably some others that wont be as nice.

This has been covered quite a few times already! Just yesterday in fact!

https://honda-tech.com/zerothread?id=1011270</TD></TR></TABLE>

I actually did search and didnt come up with anything interesting. Thanks for your reply and I have already seen that thread. But what I dont understand is why some people would rather run a GSR crank than a LS crank. The LS crank will make MORE power and MORE torque than the GSR. And dont get me wrong, I know fuel and tuning is KEY, and it will be perfectly Tuned.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Full-Race Henry &raquo;</TD></TR><TR><TD CLASS="quote">

1857cc &gt;1819cc</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Full-Race Henry &raquo;</TD></TR><TR><TD CLASS="quote">it will be perfectly Tuned.</TD></TR></TABLE>

Damn right...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Full-Race Henry &raquo;</TD></TR><TR><TD CLASS="quote">But what I dont understand is why some people would rather run a GSR crank than a LS crank. The LS crank will make MORE power and MORE torque than the GSR. </TD></TR></TABLE>

Dont you need to use LS rods? That would be the reason...

I could be wrong though.

 

There are obvious advantages to using the LS crank and rods. The question comes down to whether you want to use weaker rods to gain more power.


While I'm here... I might as well plug my own stuff

Before building this engine, click the link in my signature... I have a VERY well built engine that was put together specifically for H1 rules.

 

i think its good that a awsome place like fullrace is moving into the RR venue of motorsports.

as far as the motor goes, is that bumb in compression and disspalcment going to be that effective with the restriction on the TB and IM, for you to risk runing weaker rods? i think there is a point of diminishing return, on this one. Yes you can get higher compression, and more dissplacement, but with a weaker bottom end, and is that bumb even going to make that big of a difference with the stock TB and IM.

i think the GSR crank and rods is the best bet, this motor is gona see 20~ minutes within its top 4-5 thounsand rpms, you need it to be able to handle it

 

Stupid question here, but what/who is Full Race?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sean O’Gorman &raquo;</TD></TR><TR><TD CLASS="quote">Stupid question here, but what/who is Full Race?</TD></TR></TABLE>

search noob

http://www.full-race.com/

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Full-Race Henry &raquo;</TD></TR><TR><TD CLASS="quote">What do you guys think?

</TD></TR></TABLE>

I think you made the wrong block choice.

it should start with a K , not a B.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JeffS &raquo;</TD></TR><TR><TD CLASS="quote">

search noob

http://www.full-race.com/</TD></TR></TABLE>

Heh, I suppose I deserved that one.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Doctor CorteZ &raquo;</TD></TR><TR><TD CLASS="quote">

I think you made the wrong block choice.

it should start with a K , not a B.</TD></TR></TABLE>

 

no such thing as a 81.5 mm CTR piston!!! only 81 and 81.25

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Full-Race Henry &raquo;</TD></TR><TR><TD CLASS="quote">Hey Everyone,
I am new to the Road Race/Autocross world and I have been thinking about building a H1 Motor.
This is what i am for sure going to use:
GSR Block
CTR .020 Oversized Pistons which equals 81.5mm
Now what do you guys think i should go with:
</TD></TR></TABLE>

since your new, i think it would be nice to have an engine that your sure can get you through an entire season, ive had lots of down time with ls bottom ends on race tracks (PIR and parump) spun rod bearings
if it was in my car, id want the gsr crank, id feel a lot more confident driving my car without having to fear the rpms
you doin this or it goin in justins car?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Full-Race Henry &raquo;</TD></TR><TR><TD CLASS="quote">
This is what i am for sure going to use:
GSR Block
CTR .020 Oversized Pistons which equals 81.5mm
</TD></TR></TABLE>

Will you be using the GSR head as well?

If so, compression will be well north of 12 on both setups.

~12.5 with the GSR Crank
~12.9 with the LS crank.

Assuming no milling & a stock thickness headgasket.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by slammed_93_hatch &raquo;</TD></TR><TR><TD CLASS="quote">i think its good that a awsome place like fullrace is moving into the RR venue of motorsports.

as far as the motor goes, is that bumb in compression and disspalcment going to be that effective with the restriction on the TB and IM, for you to risk runing weaker rods? i think there is a point of diminishing return, on this one. Yes you can get higher compression, and more dissplacement, but with a weaker bottom end, and is that bumb even going to make that big of a difference with the stock TB and IM.

i think the GSR crank and rods is the best bet, this motor is gona see 20~ minutes within its top 4-5 thounsand rpms, you need it to be able to handle it</TD></TR></TABLE>

See Henry I TOLD YOU Yes Henry and I have been talking about this back and forth, I feel GSR Rods/Crank would be better in the long run, he felt different...granted, Henry IS trying to learn more and I think we're helping each other here. He being from a Drag Race back ground and myself having done HPDE's for the last year. The point about more torque is good, but at what price? That is my biggest concern, as a budget minded road racer...and I'm still learning

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Doctor CorteZ &raquo;</TD></TR><TR><TD CLASS="quote">

I think you made the wrong block choice.

it should start with a K , not a B.</TD></TR></TABLE>

someone is on point

get a clue henry!!!!!!!!!

 

Yeah and all those K-series HC motors blowing up(what was it 1 or 2 in the runoffs?) They're meant to do ONLY what they were built for, and they are still a few years off from being reliable for road racing applications. Plus I don't have 5 or 6 grand to drop on a motor...then who know how much fab work it will take to shoe horn it into an EF chassis.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PSUCRX &raquo;</TD></TR><TR><TD CLASS="quote">then who know how much fab work it will take to shoe horn it into an EF chassis.</TD></TR></TABLE>

IMO K series is a bad idea for an 88-91 civic/crx for RR, unless you have a huge budget. which you stated you don't.

 

you better have a large budget if you want to be more than mid-pack at best.

Open class racing is not for the faint of heart , or wallet for that matter.

 

its no one's fault except for the person who built the motor.

If you cant get a k series in your crx, then dont do it. Henry works at Full Race, we can probably figure out a way to get a K series in a car.

 

So honda sucks at building motors?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PSUCRX &raquo;</TD></TR><TR><TD CLASS="quote">So honda sucks at building motors?</TD></TR></TABLE>

No, these guys are just good at blowing them up. When you rev them higher than they were made to be, then sometimes you run in to problems...